 In Oregon, when the bully George Tooney beats his schoolmate Sam Merric, his older brother Rocky Merric schemes a prank with his two also teenager friends Clyde and Marty seeking revenge. They invite George, Sam and his girlfriend Millie to a boat trip along the river, with the intention of humiliating George and get even. However, Millie convinces Sam to call off the plan and the boys accept in spite of the reluctant Marty. When they decide to play "truth or dare" in the middle of the river, the truth about the prank is disclosed to George and he offends the boys mostly the traumatized Marty, leading the group to an accident with tragic consequences.