Following the inner thoughts of Lily Hannock, Deep Betrayal, the sequel to Anne Greenwood Brown's Lies Beneath, is a dark and twisted tale of mermaids like you have never laid your eyes on before. Lily imagined a semi-normal life after Calder's sister is no longer out for blood, but when she reveals her father's true merman self, she  is stuck ashore while her father and the merman she has come to love roam the deep recesses of Lake Superior. Alone and forgotten Lily doesn't even begin to imagine the problems she has to face when the dead begin to beach upon the cold shores. With no one coming forward and no one to trust, Lily must discover the culprit before the body count rises.