As a half–succubus, Angel needs energy from sex to live. The temporary fulfillment she gets from strangers is nothing compared to the erotic encounters in her linked dreams with Ian, the man whose soul she shares. Lately the dreams have become more intense and intoxicating, which can mean only one thing: she and Ian are dying, just like the magical crystal that purifies the city's air. Only by making love in person and joining their split soul can they heal both themselves and the crystal.

Yet despite Ian's amazing sexual prowess, Angel doesn't want to give up her other lovers, like sassy steam engineer Jezebel. Can they resolve their differences and continue sharing a bed to save themselves–and the world?