Though guilt over her younger sister's drowning has kept her away, Astrid Johansen returns to Heron Bay after seventeen years when her aunt claims to have found a letter that will change everything about the past.

Dark secrets are revealed when a therapist becomes obsessed with her troubled new patients. When Erin and Will walk into Maggie's office for a marriage counseling session, Maggie believes they are an ordinary couple with ordinary communication, intimacy, the usual. When Erin mentions something connected to Maggie's past that she couldn't possibly know, Maggie is disturbed: Why does Erin know anything about Maggie's long-missing sister? She wants...