Earth is peaceful following the Tournament of Power. Realizing that the universes still hold many more strong people yet to see, Goku spends all his days training to reach even greater heights. Then one day, Goku and Vegeta are faced by a Saiyan called 'Broly' who they've never seen before. The Saiyans were supposed to have been almost completely wiped out in the destruction of Planet Vegeta, so what's this one doing on Earth? This encounter between the three Saiyans who have followed completely different destinies turns into a stupendous battle, with even Frieza (back from Hell) getting caught up in the mix.

As the Straw Hat Pirates prepare to finally enter the Grand Line, they each reflect on the many adventures that brought them here.

Bardock, Son Goku's father, is a low-ranking Saiyan soldier who was given the power to see into the future by the last remaining alien on a planet he just destroyed. He witnesses the destruction of his race and must now do his best to stop Frieza's impending massacre.

The Saiyan named Turles has come to Earth in order to plant a tree that will both destroy the planet and give him infinite strength. Son Goku and the Z Warriors cannot let this happen and duke it out with the invaders for the sake of the planet.