Curse and Metal are traveling different dimensions after Sally and Eggman died. Before they died, Eggman He give Curse sonic a portal gun and 6 million dollars. Until the portal gun shoot a red portal that they never seen before. Now Curse and Metal Sonic have to find a way how to make the portal gun working again. However, They then discover a goal in Hell that Curse must complete. His new mission is Hotel Redemption.