Fool Me Once follows Maya Stern, a grieving mother struggling to come to terms with the brutal murder of her husband, Joe Burkett. Her world is turned upside down when she installs a nanny cam to keep an eye on her young daughter and discovers a man she recognizes in her home—her husband, who she thought was dead. As Maya begins to investigate the impossible sighting, she finds herself entangled in a web of secrets and lies that stretch back decades. Simultaneously, Detective Sergeant Sami Kierce leads the homicide investigation into Joe's death while grappling with his own dark secrets. As the two paths collide, they uncover a deep-rooted conspiracy involving the powerful Burkett family and a series of mysterious deaths that suggest Maya's husband may not be the man she thought he was. The series is a tense psychological thriller that explores themes of grief, trauma, and the dangerous nature of hidden truths.