The world was shocked by playwright Sarah Lingate’s death 30 years ago at an opulent, white-washed villa on the island of Capri. Absolved of the crime, the Lingate family maintains that what happened that night was a tragic accident. And every July they return to Capri to prove it’s true. This time, Helen Lingate – sole heir to the family fortune – has a plan. Tightly controlled by her father, she enlists the help of the family assistant, Lorna Silva, to free herself from her family’s stranglehold on her life. And yet, behind closed doors, the legendary Lingate family unity is at breaking point. Upon arrival at the villa in Capri, a anonymous gift awaits them: the necklace Sarah was wearing the night she died. In the aftermath, the paranoid, insular Lingates begin to unravel. As the investigation into her mother’s death is reopened, Helen begins to lose trust in everyone around her.