Ever since Margaret began using the Firebird, a device invented by her parents, Margaret has attracted the attention of enemies who will do anything to force her to help them gain control of the multiverse. They are even willing to hurt the people she loves. She resists until her boyfriend, Paul, is attacked and his consciousness is shattered into pieces across multiple dimensions. Margaret has no choice but to search for every shard of Paul's soul. On this hunt, she runs through war-torn San Francisco, the criminal underworld of New York, and glittering Paris, where another Margaret is hiding a shocking secret. Each world is another step towards saving Paul. But with every trial she goes through, she questions the destiny she believed they shared more and more.