A crazed killer escapes from an asylum and assumes the identity of his twin brother, a famous and respected architect.
Armitage runs a chemical company that is on the verge of producing a gas that causes temporary disability. Clearly the military want it but it is also sought by a group of Japanese. Both Armitage and Madam Greenfly hire different people in the same detective agency to guard the gas and steal it respectively... confusion, double crosses and hilarity ensue...
BBC Play of the Month adaptation of Shakespeare's tragic love story.