A misfired Chaos Control flings Sonic the Hedgehog and his friends out of their own world and onto a planet of humans. There a lonely boy named Chris Thorndyke pulls Sonic out of his swimming pool and takes the group in. With Tails, Amy, Knuckles, and Cream stranded alongside him, Sonic races Dr. Eggman to recover the scattered Chaos Emeralds before the doctor can turn them against this new world.