A ticking-time-bomb insomniac and a slippery soap salesman channel primal male aggression into a shocking new form of therapy. Their concept catches on, with underground "fight clubs" forming in every town, until an eccentric gets in the way and ignites an out-of-control spiral toward oblivion.
When Steven Grant, a mild-mannered gift-shop employee, becomes plagued with blackouts and memories of another life, he discovers he has dissociative identity disorder and shares a body with mercenary Marc Spector. As Steven/Marc’s enemies converge upon them, they must navigate their complex identities while thrust into a deadly mystery among the powerful gods of Egypt.