When 17-year-old Georgia’s brother drowns while surfing halfway around the world in Australia, she refuses to believe Lucky’s death was just bad luck. Then a stranger named Fin arrives in False Bay, claiming to have been Lucky’s best friend. Soon Fin is working for Lucky’s father, charming Lucky’s mother and dating his girlfriend. Georgia begins to wonder if Fin murdered Lucky in order to take over his whole life. She is certain she’s getting closer and closer to the truth, but as she does, her mental state becomes more and more precarious, and no one seems to trust what she’s saying.