Evan Graham has an embarrassing secret. When his sister Alexa spreads it around the school, he gets furious -- and so does his father. For his living, the father makes medicines related to women's bodies. He looks the other way while his son uses his chemistry set to torment his sister. She soon understands that she truly deserves all he does to her. He extends his chemical reach to other girls who had spread his secret, and follows torment by fulfilling his sexual dreams.