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Quincy (Jack Klugman) is an unwilling key player in an elaborate vengeance scheme concocted by arrogant paralegal Carl Norman (Jeff Pomerantz). After the 7-year-old granddaughter of law professor Henry Hillman (Lew Ayres) is kidnapped in broad daylight, Norman calmly walks into police headquarters and confesses to the crime, further demanding to be put on trial immediately. Using the flaws in the legal system to his advantage, Norman is supremely confident that he will not only be acquitted for the crime, but that he will be able to collect the ransom for the girl without running the risk of a future arrest--thanks to that all-too-familiar loophole known as "Double Jeopardy".