The marriage is fake. The danger is real . . . A child is all scientist Hannah Dietrich has left of her late sister . . . a child possibly kidnapped by the mysterious cult her sister had joined. To discover the truth about Emily's death and find her infant daughter, Hannah turns to BLM Special Agent Walt Riley. Posing as a married couple, they infiltrate the "Family" as devoted followers of the Prophet. Delving into the cult's dark secrets proves harder than expected—yet their roles feel disturbingly easy for the fiercely independent Hannah and the no-nonsense lawman. Has their charade become a real relationship? And if they find the infant, how will they escape the Prophet's murderous wrath?