Chapter 1: After the War

After the battle between Infinite & Dr. Eggman, one day Sonic encounters a phantom ruby in which he became possess by Infinite. To make matters even worse, Blaze fled her own dimension to Sonic's world to warn him of a new threat which are the Seven Monarchs. Hearing this new Sonic & Dr. Eggman team up for the first time with the help of Blaze but this time is without his usual friends.