When Evie Kawalska visits her wealthy stepfather’s villa in Malta, she quickly bonds with her neighbor, the captivating Diana Shaw—unaware she and her boyfriend, Reese, are con artists after her stepfather’s fortune. Meanwhile, a string of mysterious killings blamed on the "Maltese Phantom" grips the island. As Detective Claudia Cavara investigates, Evie and Diana’s fragile trust shatters, pushing their dangerous relationship past the breaking point.