Detective Kat Donovan's life takes a shocking turn when she discovers her long-lost fiancé, Josh Buchanan, on a dating app, eleven years after his mysterious disappearance. As she grapples with the emotional fallout, Kat investigates the recent disappearance of a young woman linked to Josh. The episode introduces a web of secrets and connections that intertwine Kat's past with her present, setting the stage for a gripping mystery.