Graham Young is a teenage misfit living in suburban London in the 1960s. He hates his stepmother but loves chemistry, and the two impulses unite in a wicked plot to slowly poison her. After she dies, he's found guilty and sent to a psychiatric hospital, where an idealistic doctor thinks he can be cured.

• Eurimages
• British Screen Productions
• Hugh O'Conor
• Antony Sher
• Ruth Sheen
• Roger Lloyd Pack
• Charlotte Coleman
• Paul Stacey
• John Thomson
• Jack Deam