After recovering from an attack from Infinite, Sonic and his entire group reunite to stop Infinite from destroying every universe that has Sonic. They will have to travel to the AOSTH universe, go to the Movie universe, enter the main timeline (Modern Sonic), and face even more different universes and timelines of the Sonic franchise, all to track down Infinite and hopefully stop his conquest on the Sonicverse. But they'll also have to face some old enemies from the past such as Mammoth Mogul, Starline, Mephiles, Iblis, Dark Gaia, Enerjak, Black Doom, and even Metal Sonic!!! Can Sonic and his multiversal counterparts take them on? Or is Infinite's cult too much to handle?
