Based on the true story of Graham Young, a young British psychopath of the 1970s, this is the offbeat feature film debut of writer-director Benjamin Ross.
Hugh O'Conor plays Young, who narrates the story in a sullen voice-over. He is an isolated, studious young adolescent who is increasingly absorbed in his chemical research projects and estranged from his annoying family. After his greatest experiment blows up, he seeks revenge on his stepmother, who has falsely accused him of hiding pornographic magazines.
The boy poisons her chocolates and then his sister's eye drops, partially blinding her. He next poisons his stepmother's stomach medicine. Graham lets her discover the notebook in which he has documented his work, but she can no longer speak, and she dies unable to communicate the truth.
Young then starts to poison his father -- but lets himself be discovered and is sent to an insane asylum. There, he is befriended by a psychologist, Dr. Ziegler (Anthony Sher), an optimist who hopes for a recovery by exploring Young's dreams.