FBI agent Devyn Nash's pursuit of a deadly organization heats up in this fourth installment of the Risky Research series. The FBI locates the mastermind behind Coterie, but attempts to bring him in result in a shootout that sends Coterie's members scrambling for cover. When Devyn's partner is left fighting for his life in a Puerto Rican hospital, she becomes more determined than ever to bring them to justice. Devyn's decision to ignore her orders puts her job and her relationship with Sheriff Gage Harris in jeopardy, but she is unwilling to allow the syndicate responsible for so much death to live out their lives in paradise.