Cat Juvell is a beautiful, brilliant detective, with a black belt and a knack for solving difficult cases. Now Cat and her partner, Jax Carpenter, have been hired by a wealthy industrialist to retrieve his sister Kolla - and the family's millions - from the control of a mysterious cult known as the Golden Sun. There's only one problem: Kolla doesn't want to be rescued. Golden Sun's charismatic young leaders - twin siblings Joy and Tomo - are rumored to have miraculous powers to heal and transform, and its inner circle performs mystic erotic rituals in a quest to reach a higher consciousness. But there are also suggestions of darker practices and a whispered phrase - "Iron Shadows" - that hints at a long-slumbering conspiracy of terror. As Cat and Jax go undercover to infiltrate the Golden Sun, they find themselves drawn into its seductive web, learning shattering truths about themselves as they begin to uncover the secret of the cult's terrifying mission.