Struggling actor Foster Twelvetrees (Frankie Howerd) is invited to a large country home by Stewart Henderson (Ray Milland) to perform a dramatic reading for his family. Outwardly, Stewart is complimentary and enthusiastic, but his more sinister intentions were made clear when earlier he secretly sliced a poster of Twelvetrees. Whilst they chat, Stewart's sister Jessica (Rosalie Crutchley) and their Indian servant Patel (John Bennett (actor)) begin searching through Twelvetrees' luggage. Twelvetrees nevertheless responds with an unintentional wit and bumbling characteristic throughout the rest of the film.