have you heard of the legend of a mysterious blue hedgehog? one that looks exactly like Sonic but only exists to kill? long ago there was a very evil man with an IQ of over 300. he wanted all the world to himself. but a young blue hedgehog hero named Sonic would never let that happen. they fought for years until at last Eggman had killed Sonic with his giant Death Egg Robot. but then a mysterious blue hedgehog was reported to have been seen killing and tormenting people who were once his friends. he looked exactly like Sonic except for the claws, fangs, and his eyes were pitch black with red irises. could this be Sonic, back from the dead? you aim to find out so you set out on a journey. however that journey takes a much darker turn when you encounter Sonic EXE and the real nightmare begins.