Henry Perkins mistakes his briefcase for a stranger's on the subway and is suddenly the owner of £735,000. Just then criminal energy awakens in Henry. However, the plan to leave England with his wife becomes unworkable when friends turn up, when two policemen take an intense interest in Henry (and turn out to be eminently corruptible), when the real owner of the money is found dead in the Thames and identified as Henry Perkins from the papers in his briefcase, and when a mysterious gangster boss turns up outside the house .
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