A local bus driver claims that he is being hounded by the driver of a mysterious van, but no one else has seen it. Supt 'Razor' Reid visits Wokenwell to review the viability of the local station.

A stranger arrives in Wokenwell, claiming to have lost his memory. Investigations into his background suggest he might be dangerous.

When a mystery man in an iron mask launches a campaign of terror in Wokenwell, the local postman comes under suspicion.