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John Gillespie is a publisher enduring a crisis: his partner has left town with all the firm's money, and Gillespie will be ruined if he cannot come up with capital quickly. With no other resources, he turns to his wealthy Aunt Mary, who is decidedly unsympathetic to his plight and refuses to loan him the money. Full of despair, Gillespie hails a taxi -- and discovers a windfall of £2,000 therein. Wary of what could happen, he hides it in a rented room and decides not to take his wife into his confidence, telling her that he has taken the room to conduct business. In the midst of all this, his aunt is discovered dead under suspicious circumstances, with her safe found to have been broken into. Gillespie is interviewed by the police and -- nervous and afraid that he would have to give up the £2,000 he discovered in the taxi if he tells them the truth --he is unable to account for his actions and is promptly arrested. With a charge of murder soon to be leveled at him, Gillespie finds himself relying on the efforts of a former servant to help prove his innocence.