The series takes place in the main city of Avalon on Catalina Island, where LA Sheriff Department Detective Nicole "Nic" Searcy heads up a small office. Catalina has a local population that serves more than 1 million tourists a year, and each day when the ferries arrive, hundreds of potential new stories enter the island. Detective Searcy is pulled into a career-defining mystery that will challenge everything she knows about herself and the island.