In a Brazilian village infested with piranhas, Nanã and Mel are fast growing into adolescence as they dream of ways of protecting themselves against a seemingly inescapable violence. When a mysterious body appears tangled in a fisherman's net, they learn what might be their ultimate protection.
In an abandoned farm, young Tatu is tricked by three older kids into believing that if he overcomes certain challenges he will become a MAPUTO, a supernatural being. Tatu remains resolute in his pursuit even as the tasks become increasingly dangerous.
