After the events of Sonic Forces, 15 year old Sonic was pulled into the world of Earthland and takes on a whole bunch of new enemies along side his new family members of the Fairy Tail guild. (Starts at the Oración Seis arc)
Eggman latest plan has caused the entire planet to shatter into pieces. Causing a long sleeping being of pure evil to awaken from his slumber. And the members of Team Natsu have been transported from their world, and into Sonic world. Now Sonic an must join Sonic on a world wide journey on the planet to fix the planet and stop Dr. Eggman plans once and for all.