Several months later after the final battle from Dr. Eggman death egg (S3&K). Sonic and his friends take a relaxing vacation at Never Lake during the summer night festival. A unusual event occurs, Sonic and his friends are suck into a strange dark void, teleported into a place that look like Never Lake but different. Sonic notice that something not right as he and Tails see Eggman robots around! And Amy is missing again along with Knuckles! Mean while, Knuckles awoke in a enchanting forest, thinking he’s back in Angel Island…but he’s not…

Journey with Sonic, Tails, and Knuckles for a incredible quest as to why are they at the unheard land, Haven Home World!