In the movie Kung Fu Panda 3, Po is a happy bear, but it is not one hundred percent, because it has a thorn in it. That thorn is his father, whom he has never known. That is why, when the father of Po appears at the beginning of the film, our protagonist can not be happier
Together they want to recover the lost years, so they go to a paradise for pandas, in which they seek tranquility and catch up. Po has many questions that his father will try to answer.
The tranquility is short for them, since bad news comes to the ears of Po. Kai is a villain who does not look like this world and who is touring China from end to end, to beat the best masters of Kung Fu.
Po knows that it is only a matter of time before Kai goes to visit his paradise for pandas, so he sets to work, training his companions, who seem too clumsy to learn to fight.