Fourteen-year-old Luce has had a tough life, but she reaches the depths of despair when she is assaulted and left on the cliffs outside of a grim, gray Alaskan fishing village. She expects to die when she tumbles into the icy waves below, but instead undergoes an astonishing transformation and becomes a mermaid. A tribe of mermaids finds Luce and welcomes her in--all of them, like her, lost girls who surrendered their humanity in the darkest moments...