"Kate and Calvin are on the trip of their dreams in Costa Rica, hoping to heal their marriage after years of difficulty and loss. When they meet a young newlywed couple at their resort, an attraction develops between the two couples that threatens to disrupt both marriages. After a life-threatening shark encounter, with emotions and adrenaline running high, the couples act on these simmering feelings--and the morning after, Kate awakens to find herself covered in blood, her husband missing, and the young couple dead. As she goes on the run and furiously tries to unravel the mystery of what happened in that hotel room, Kate uncovers connections leading back to her life in New York and the secrets she's hidden for years. Traveling deeper into the Costa Rican jungle, will Kate find her husband and the answers she seeks--or will her sanity be tested to its limits?" -- Back cover.