Yue, Shifu, and the Five were fighting against the enslaved masters on a roof. Po leaps into the fray.
Po: Enemies of justice! Prepare for-
Po sees one of the Badger Twins, covered in jade stone.
Po: Wha... Are you kidding me? Whoa!
Po crashes into the roof and falls down.
Po: Ow!
Yue, Shifu, the Five, and the enslaved masters stop fighting for a moment to look at him.
Po: Ow!
The fight continues. Shortly after, Po climbs back up the roof.
Po: What's the deal with the green guys?
Yue dodges an arrow as she jumps on top of Porcupines head and kicks him in the face.
Yue: Beats me!
Viper winds around a Badger twin, and Tigress punches it. She winces, shaking her paw.
Tigress: Some kind of jade zombies.
Po: Jade zombies?
Monkey lands near Po.
Monkey and Po: Jombies! *Pointing at each other* Jinx!
Yue: Guys, focus!
Monkey gets hit on the head with one of the Badger's Twin's staffs.
Monkey: Ow!
Monkey is yanked away.
Li: Lotus, be careful!
Huang: You too, Suzhen!
Yue: Don't worry, we're good!
Yue sees the Badger Twins approaching from each side. She jumps high in the air, causing them to crash into each other.
Po: It's okay, Dad, I do this every day!
He gets struck by Master Porcupine, who slams him into a roof.
Po: Whoa. I recognize these guys! The master Badger Twins... with their crushing double gong technique!
The Badgers hit him simultaneously, knocking him deeper into the roof.
Po: OW!
The Badger Twins nod at each other and run off. Po climbs up.
Po: Yeah! That's the one.
Yue: How are they here? Aren't they supposed to be dead?
Po watches Shifu fight a jade master.
Po: And that guy is... *Gasps* No! Master Porcupine!
Porcupine shoots an arrow at Po. Monkey comes up and deflects it back at Porcupine.
Monkey: I thought he died a hundred years ago!
Yue: Same! How did kung fu masters come back from the dead? And what's with the jade look?
Po: These guys are legends!
He brings a painter on the roof.
Po: Get a quick sketch of us.
Yue: Po! Oh, why do I even bother?!
Po fights Porcupine for a moment and does a peace sign after managing to trap him in a hug. Porcupine kicks him in the face and jumps away. Po runs back to the painter.
Po: Did you get it? Did you get it?
He sees the picture of Porcupine kicking him in the face.
Po: Aw, I blinked. Can we... get another one?
Porcupine pushes Po off the roof. They land on Po's old bedroom.
Po: I'm being choked by Master Porcupine! This is so cool.
Hulls Porcupine action figure from the shelf.
Po: Oh, oh, look. It's you!
Yue pushes back Porcupine.
Yue: Po. Focus!
We cut to downstairs, where Mr. Ping is seen cutting a radish.
Mr. Ping: *Angry* Message from the universe? I'll give you a message from the universe... Stay away from my son!
Po and Porcupine fall from above to continue fighting.
Po: Sorry, Dad, I'll clean it up later.
He picks up a pan.
Mr. Ping: Whoa, whoa, not my good pan! Take this one.
He hands Po a ladle. Yue comes in, seeing the whole ordeal.
Yue: Really, dad?
Huang: What is with that goose?
Li: Lotus, watch out!
Po fights against one of the Badgers. The ladle breaks. He dodges a strike, causing a drawing of Po to be cut in half. Li gasps in fear.
Po: Dad, check out my Dumplings of Doom!
Po kicks a table and launches bowls of dumplings into the air. When he catches all of them with his mouth, Viper wraps herself around Po's stomach, and Yue pulls Viper's tail back to release the dumplings on the enslaved masters. Shortly after, the trio pins down Porcupine and the Badgers.
Po: Gotcha.
Porcupine and the Badgers' eyes suddenly glow. Kai laughs, to everyone's surprise.
Kai: I see you. Your chi will soon be mine.
Po: Is he talking to me?
Yue: Or is he talking to me?
Tigress: Which one? They're all talking.
Po: Whoa, you're right. That's so scary. We should try that, too. Maybe it'd be scary back at them.
Mantis: Okay, but we gotta plan what we're gonna say first. Otherwise, it won't be scary. It'll be just stupid.
Yue: What? Like this discussion isn't already stupid enough?
Kai: It's not them talking, you idiots! It's me talking through them, Kai.
Po, Yue, Shifu, and the Five: Who?
Kai: Okay, okay, okay, enough.
Kai converts the enslaved masters back into jade pendants, which flies all the way back to him. Po, Yue, Shifu, and the Five look up in confusion.
Po: Did you see that? Did you see?
Yue: I certainly did.
Mantis: Whoa, what just happened?
Po: The green smoke just poof... and then poof! Shifu, what was that?
Yue: And who's this Kai person?
Shifu: Kai. Kai. Kai... Nope. Never heard of him.
We cut to Po, Yue, and the Five watching Shifu look through all the scrolls in the Jade Palace library.
Shifu: Kai. Kai. Where is it? There's so much wisdom in here that I can't find anything.
He picks up a jade scroll.
Shifu: Yes. Behold. All the answers will be found within. *Opens scroll* What? It's blank? Are you kidding me? Not again.
Yue, Monkey, Tigress, and Crane facepalm at this.
Shifu: Wait, wait. Hold on. Sorry. Oh, ok, here we go.
The others move next to Shifu.
Shifu: It is written in Oogway's hand.
As he reads the scroll, Li, Huang, and Mr. Ping are seen standing nearby.
Shifu: Long ago, I had a brother.
Monkey: Oogway had a brother?
Shifu: In arms. In arms. Sorry. He says brother in arms.
Mantis: Can you just unroll it all at once?
Yue: Yes, for everyones sake.
Shifu refuses to unroll it. He continues to read it as Oogway's voice overlaps his.
Oogway: *Narrarating* I was an ambitious young warrior...
The ink on the scroll becomes fluid, creating images as Oogway's words continue.
Oogway: ...leading a great army. And fighting by my side was Kai. My closest friend. At the same time, I was teaching to a very bright fox named Suyin.
We cut to the present. Everyone was shocked to hear that.
Po: Master Suyin was Oogway's student?!
Yue: Well, we figured that Oogway was the one she gave the scroll of Fox Style to, but I didn't think that she was his student.
We cut back to the flashback as the narraration continues.
Oogway: One day, we were ambushed. I was badly wounded. My friend and student carried me for days... looking for help. Until we came to a secret village, high in the mountains. An ancient place of healing. A village of pandas.
We cut back to the present. Everyone gasps.
Po: Pandas?
Oogway: *Offscreen* Yes, pandas.
Yue: Did anyone hear that?
Po: Hear what?
We cut back to the flashback.
Oogway: *Narrarating* Pandas who used the power of chi to heal me. They taught me how to give chi. Suyin tried, but she could not figure out the secrets to use Chi. But Kai wanted the power all to himself. He saw that what could be given could also be taken. I had to stop him. Our battle shook the Earth. It was a battle that Suyin tried to fight for me, only for it to end with her losing her ability to walk. Finally, I banished Kai to the spirit realm. Should he ever return to the mortal realm, he can only be stopped...
We cut back to the present as Shifu finishes reading.
Shifu: ...by a true master of chi.
Po: True master of chi?
He points at Shifu.
Po: Like you!
Shifu: Me? I can barely make a flower bloom. I'd need at least thirty more years and a cave.
Viper: We need a chi master.
Shifu: He will continue stealing the chi of masters until he has consumed it all.
Po and Yue sneak off from Shifu and the Five. They look at the early parts of the scroll, Po taking notice of the ancient pandas that could teach chi, and Yue looking at the drawing of Master Suyin standing next to Oogway.
Viper: We have to make a way to stop him.
Crane: Or he'll get more and more powerful with every master he defeats!
Tigress: There is no choice. We fight.
Li: I can teach you, son.
Mr. Ping gasps, and Huang looks at him incredulously.
Yue: Say what?
Po: You can do this?
Huang: Uh, you never mentioned this to m-
Huang was cut off when Li put his paw over the foxes mouth, shutting him up.
Li: Well, of course. I'm a panda.
Po: That must be why the universe sent you here! Okay, so what do I have to do?
Huang glares at Li, making the adult panda remove his paw from the foxes mouth.
Li: You have to come home with me.
Mr. Ping: What?
Po: To the secret village?
Li: Yes, son. You must rediscover what it is to be a panda. You have to learn how to live like a panda. Sleep like a panda. Eat like a panda. Those 103 dumplings? Hmph... I was just warming up.
Po: I've always felt like I wasn't eating up to my full potential.
Mr. Ping: You can't take Po away from me. No, no, I want a second opinion. Shifu, open another scroll or something.
Shifu: I think he should go.
Mr. Ping: Fine, a third opinion. Monkey? Viper? Tigress? Yue, he's your brother. Talk some sense into him.
Huang gives the goose an offended look that says,'What I am then?'
Yue: Please don't drag me into this, dad.
Po: Dad, you heard what Shifu said Oogway said. This guy can only be stopped by a master of chi, and Yue and I can only master chi by knowing who we really are. Well... I'm a panda, and she's a fox.
Mr. Ping: *Sad* I'll pack both your lunches for the road.
Yue: Uh, Po? A word before we go.
Yue drags Po by the arm away from everyone to talk in private. Unknown to them, Huang manages to overhear their conversations with his hearing.
Po: Yue, what's wrong?
Yue: Look, I don't mean to sound untrustworthy of your dad, which is ironic, coming from a species that's stereotyped as untrustworthy, but don't you think it's weird that Li says he can teach us chi just as we were desperate for a solution?
Po: Well, like I said, the universe must have sent him here to teach us chi.
Yue: If that was the case, why didn't he mention it sooner? I don't think-
Yue gets interrupted when Po speaks up.
Po: Look, Yue, this is our only chance to learn chi and to stop Kai. Please, trust me on this.
Yue looked at Po in the eye, seeing the desperate look present. She let out a sigh.
Yue: Alright, I trust you.
Po: Thank you.
Po walks away, leaving Yue alone to her thoughts.
Yue: Everything I do is for you, Po. But when will it be my turn?
Huang noticed Yue's somber look and made his way towards her.
Huang: You okay?
Yue: Huh? Yeah, I'm fine. Just... have a lot on my mind.
Huang: If it makes you feel better, I can come along with you.
Yue: Really? You know this isn't a simple camping trip.
Huang: Well, I thought that you could use a medic. I may not be an official doctor, but I do know my medical knowledge. If you want to, that is.
Yue blinked before smiling.
Yue: Sure. It wouldn't hurt to have a medic on board.
Unknown to them, Po was looking at them with a disheartened look. He couldn't help but feel anxious when he saw Yue smile when she was with her biological brother. Sometime later, Po, Yue, Li, and Huang were hiking their way to the secret panda village. Shifu and the Five look from above on the Jade Palace.
Viper; Do you really think Po and Yue can master chi in time?
Shifu: Doesn't matter what I think. It only matters what the universe thinks.
Mantis: So... that's a no?
Shifu frowns.
Crane: Master, what are we going to do?
Shifu: You are going to find out where Kai is. Follow the trail of those jade creatures, but do not engage. For with every foe he faces, Kai becomes stronger.
Crane: Why me? Is it because I asked?
Shifu: No, it is because you can fly. Go!
Mantis: Should've kept your beak shut. *Laughs*
Shifu: And take Mantis.
Mantis: What? Oh man, is it because I-
Shifu: Yes.
Mantis groans. Crane flies off with Mantis on his hat.
To be continued...