Five years after the events of the original Dragon Ball Z series, Dragon Ball Z Kai covers the later stories of Goku, Earth's greatest and most powerful warrior.
Finally settled down with a family of his own, Goku is adjusting well to the times of peace with his son Gohan. However, the peace is short-lived when an intergalactic visitor claiming to be Goku's brother, makes a crash landing on the planet.
Goku struggles to recall certain elements about his past, most importantly the fact that he is one of the final survivors of the Saiyan alien race. Krillin - Goku’s fellow warrior and training partner with whom he studied under Master Roshi – helps Goku on his quest.
With the fate of entire galaxies hanging in the balance, Goku must confront progressively stronger foes in the continuous fight between good and evil. Krillin, Piccolo and the rest of the warriors must reunite to defeat the Saiyan invaders led by the formidable Vegeta.
Vegeta is the Saiyan prince seeking immortality within the Dragon Balls. He leads the Saiyans – who are almost extinct, but still very powerful – in their fight to get rid of all human life and conquer Earth.
Piccolo, Goku’s arch nemesis, changes sides for the sake of helping Goku defeat Saiyan invaders. Piccolo forms a strong bond with Goku’s son, Gohan, who ends up becoming a strong force to be reckoned with after he goes through Piccolo’s training. Once considered a “wimp,” Gohan is now able to help protect Earth.
How will Goku and his team defeat the Saiyans and protect their planet?