As an immortal quasi-vampire, Suzy Donovan can never reveal her true self. Her polyamorous bi-sexual nature means there are no limits to her sex life, and her job as a late-night barmaid provides an endless supply of men and women to satisfy her lust and blood needs.

After meeting quirky but gorgeous detective Lily Carmody, she uncovers a criminal conspiracy that triggers her crime-fighting talents. She seduces her way into the criminal gang, and as the FBI takes over the case, she seduces her way into the life of Special Agent Olivia Sanchez to ensure she has the inside running. But Olivia has more to give than just information, and Suzy soon falls in love with this gorgeous woman but then she meets charismatic billionaire Tony King. With her head now spinning between her love for Olivia and Tony's marriage proposal, she must choose between them while trying to discover the identity of the crime gang kingpin. To make matters worse, her quirky ex-lover Lily gets herself into a life-threatening situation as she tries to prove herself in the hope of winning back Suzy's love.