Emma Galway's suicide has haunted the Meredith Island for fifty years. Back on the island to lay her grandmother to rest, Kate can't avoid reflecting on the death of her aunt. Learning that her late mother had believed Emma was murdered and had conducted her own investigation, she decides to track down her aunt's killer. With the help of her neighbour, impetuous and hedonistic sculptor Siobhan Fitzgerald, Kate picks up where her mother had left off. When the two women become the subject of threatening notes and violent incidents, it's clear that one of their fellow islanders is warning them off. As they begin to look into Emma's connection to the Sutherlands, a prominent Meredith Island family, another islander dies under suspicious circumstances, forcing Kate and Siobhan to confront the likelihood that Emma's killer is still on the island.