David Marion doesn't expect to find a hitman at his door and their meeting is lethal – for the hitman. Warned that a powerful secret organisation is after him, David disappears. Physicist Helen Freyl, who owns a colony of bees with unique venom, accepts a job offer from a giant pharmaceutical company. But soon Helen begins to doubt her employers' motives and realises that her own life is in danger. Venom brings David and Helen together as they fight for their lives against a backdrop of industrial espionage, corporate greed and human tragedy.