The theft of the Greater Grail from Fuyuki City leads to a splintered timeline in which the Great Holy Grail War is waged on an unprecedented scale.

A mission gone awry transports Sonic the Hedgehog, his friends, Dr. Eggman and the Chaos Emeralds to another dimension: Earth.

Jaga Bada, Mr. Satan's old sparring partner, has invited Satan to his personal island to hold a grudge match. Trunks and Goten decide to come for the adventure and Android #18 is following Satan for the money he owes her. Little do they know that Jaga Bada's scientist have found a way to resurrect Broly, the legendary Super Saiyan.