Tragedies beset Leslie, a timid, bullied respiratory therapist — her mother's suicide, a ruined career, her mistake which costs a patient's life, and numerous bloody killings near the hospital where she works. Alex, her only friend, conceals a secret — he's a 100-year-old vampire.

Seeking escape, Leslie stumbles into Adria, an alternate universe ruled by fire, vampires, and the underworld god Hades. Alex finds her near death after a brutal beating; he offers her immortality. Immortality gifts Leslie with love and longed-for healing abilities, but she becomes a target for Hades' wrath. Hades plots the destruction of all vampires; flesh-eating bats serve as his spies. Leslie confronts Hades, begging him to spare her life and Alex's...and risks frying in a towering inferno.