''Art of the Devil'' tells the story of Boom (Supaksorn Chaimongkol), a young Thai girl who meets a married man named Prathan (Tin Settachoke) at a country club. The two soon begin an affair, and Boom finds herself pregnant. When she breaks the news to Prathan, he appears to settle for giving her a sum of money in exchange for her silence, reassuring her that he will not leave her. However, he then wakes her up in the middle of the night, informing her that for that large an amount of money, he had the right to share her. While Prathan wields a video camera, his friends chase a terrified and screaming Boom out of the room and onto the beach, where they apparently gang-rape her.