After an argument with Sonic, Mighty (Chris Pratt) and his adoptive brother Ray (Boone Storm) get captured by GUN, and placed in a facility known as Prison Island where he meets a tax collector named Vector (Jack Black), a zealot named Espio (Jeremy Renner), and an orphan named Charmy (Erika Harlacher). They broke out of Prison Island, but are now the biggest target for every bounty hunter, criminal, thug, and thief out there, especially Fang the Hunter (Marc Maron). With a new friend named Trip (Alison Brie), Mighty and the team must survive assassins, bounty hunters, and soldiers to make it back to Sonic and the others. But doing so would endanger the Freedom Fighters! Will Mighty see Sonic again, or will he leave him and the rest of his friends behind to protect them?