One day at Leaf Storm, Sonic finds Dr. Eggman in his Egg Hammer Mega. After Sonic has defeated Eggman's Egg Hammer Mega, Eggman flies away, but he drops the blue Sol Emerald, which Sonic notices. Before he can pick it up however, Blaze the Cat appears in a column of flames, grabs the Sol Emerald, and leaves. Sonic goes to see his friend Tails and tells him of the situation. If Eggman is up to his old tricks, and that Blaze is somehow involved, The duo would meet up with Knuckles, Amy and Cream. After getting through Dead Line, Sonic confronts Eggman Nega demanding answers. Blaze then shows up, and Eggman Nega reveals to her that he used Dr. Eggman to get the Sol Emeralds for him. Blaze has a fight with Sonic. During their fight, Blaze reveals how her powers and duty "cursed" her to a life of solitude. Following their clash, Sonic notices Blaze's overzealous and the rough past she has had and convinces Blaze that she can rely on others for help. Blaze explains that the Sol Emeralds are drawing her dimension into Sonic's, which Tails speculates will result in the destruction of both dimensions. To stop the disruption, they have to stop Eggman and Eggman Nega. Will you join them on this crazy journey to save both dimensions once and for all?