Ever since Ross met a boy at one party who was exactly like himself, his life has turned into a complete nightmare... The double follows him everywhere, with manic persistence putting forward the only and completely absurd demand - that Ross leave from his life and gave up his place. Otherwise, he threatens to send some kind of deadly virus to Ross. Ross does not believe the seriousness of the crazy stranger's threats until, to his own horror, he notices signs of a strange illness in himself...