Geraldine Locke owns a boutique hotel on the island of St Marys. She believed her life to be idyllic until one morning she received a phone call from her mother. Geraldine leaves St Marys to confront her mother. On her return, she knows her life will never be the same again. How will her family react to her news? On a stormy weekend, Geraldine gathers her family around her to reveal her secret. But before they can react to her news, tragedy strikes. Geraldine's mother, Theresa Cook is found barely alive in the boathouse. Was it an accident or something more sinister? By morning, another body is found in the boathouse.

With many suspects and secrets to be revealed, Chief Inspector Sofia Faraday and her team must peel away the many layers of the Locke family's lives in order to find their killer.