When friends and family come to Harper island for Henry Dunn’s wedding to Trish Wellington, a serial crminal assassinates the guests one by one, only a few of them ever surviving.

The series focuses mainly on the wedding of Henry Dunn and Trish Wellington, which takes place on Harper island.One of the guests, Abby Mills, is being chased by the murders that took place here seven years before. Suddenly, the guests are killed one by one and everyone else becomes suspects. Guests manage to reveal mysteries of the island as the crime series continues