In the past, became a powerful warrior is just a dream, now Po (Jack Black) is really becoming a warrior. Unfortunately, the realization of this dream also carries consequences for Po. He should not be lazy. He had to train hard. And more importantly, Po should be able to protect the small people who are oppressed. But it really is a hero protecting the little people like that can only be achieved by learning Kung Fu?
After heavy fighting some time ago, now Po with Master Shifu (Dustin Hoffman), Master Tigress (Angelina Jolie), Master Viper (Lucy Liu), Master Monkey (Jackie Chan), Master Mantis (Seth Rogen) and Master Crane (David Cross) can breathe easier. Valley of Peace is back serene and peaceful. Unfortunately, it was not long since news emerged that require this powerful warriors down the mountain.
There was news that Lord Shen (Gary Oldman) appeared to have a secret weapon that is very dangerous. With this weapon, the king tried to rule the whole country and plans to destroy the Kung Fu martial arts. Fortunately, this powerful warriors had help from The SoothSayer (Michelle Yeoh), Master Skunkman (James Woods), Croc Master (Jean-Claude Van Damme), and the thundering Rhino Master (Victor Garber). Then began the long journey to find the warriors of Lord Shen and thwart the king's evil plans. And for that it seems Po must retrace his past and looking for weapons to fight the Lord Shen.