Present Day Productions Ltd.

Fletcher Gilchrist offers £100 to anyone who will break into a house. Journalist Mike Harvey accepts the bet but he and another man are caught when the latter murders the owner of the house. Harvey escapes custody, determined to seek revenge on Gilchrist.

An eccentric jewel-thief invites an assortment of people for a country house week-end, then keeps them prisoner after his plans to steal their jewels have been discovered.