This will be the start of Goku's further, action-filled adventures of protecting the Earth from intergalactic threats.
Serving as a direct sequel to the original Dragon Ball anime, Dragon Ball Z sees the hero, Son Goku, as a young adult with a son. One day, it comes to light that Goku is a member of an alien race known as the Saiyans, with Goku being sent to Earth with the goal of conquering the planet before losing his memory. This will be the start of Goku's further, action-filled adventures of protecting the Earth from intergalactic threats.