The Tides, a family with many secrets, are haunted by the events of one tragic day a decade ago, they are each, in their own way, struggling to move forward with their lives. Haunted by the events of one tragic day a decade ago, the members of the Tides family are each, in their own way, struggling to move forward with their lives. When Dora, the family's youngest daughter, discovers she is pregnant, she finds herself staring back at the darkness of a long-held guilt. She arrives at Clifftops, her family's rambling home on the Dorset coast, and it seems that her mother, Helen, might finally be ready to make amends for her own part in the tragedy. She soon discovers is that the path to redemption does not rest solely with her mother.