Brodie's cousin Alex comes over for the summer. Brodie comes to the pool early in the morning to teach Alex how to swim. He sees his archrival, Otis dating his crush, Pauline on the toadstool. In anger he kicks there towels and sandals into a hole and moves over behind them.
Brodie pushes Pauline. Otis tries to pull Pauline back up, but Brodie grabs Pauline. Brodie lets go and Pauline and Otis fall into the Blackwater. He swims after them to save them.
Brodie gets his forehead cut by a sharp rock, so he climbs onto a small island and calls for help. Eventually, Alex and Raoul, the police chief come and Brodie and save him.
Brodie meets his parents at the dock. He and his parents were escorted by a police officer to their house. Everyone was giving Brodie presents of appreciation, but the Raoul kept them away. Brodie entered the house and took a pill that made him very sleepy. He then fell asleep on his bed.
Brodie wakes up and finds out Pauline is dead. He goes downstairs and is interviewed by Best in the West. After Best leaves, some towels and flip-flops are at the front door. Dad says he will call Raoul.
Raoul comes and investigates the towels and flip-flops. He realizes they are Pauline's and Otis's, but one of Pauline's flip-flops is missing. After Raoul leaves, Brodie and Alex go to bed. Alex says Otis might be the one who left the towels and flip-flops.