During a summer camp, fifteen children, eight boys and seven girls, discover a hidden grotto along the coast. Inside, they find functional computers and electronic gear, and soon encounter the grotto’s owner, a man named Kokopelli. He says he is a programmer developing a new video game in which a massive robot defends Earth from alien attacks. Kokopelli convinces the children to play the game and sign a contract. All but one of the kids sign, and moments later, they wake up on the shoreline convinced that the entire adventure was merely a dream.