When a harmless prank goes too far, one teenager is drowned; another missing. Suddenly the Blackwater becomes a horrifying reminder of what Brodie has done and his cousin, Alex, has witnessed. One lie is told to cover it up, more follow . . . Then a white envelope is delivered to Brodie's house, with his name on it. He pulls out a piece of lined paper and unfolds it. Printed on it in big capital letters is one word. Tell.