A billionaire heiress is brutally abducted and held for an impossible ransom. The police investigation at a dead end, it falls to Hennessey, a troubled private detective with a pathological disregard for his own safety, to find her. But, savagely attacked in his own office, Hennessey finds himself lying battered, bruised and watched over by his sinister assailant. How will he ever be able to save both the kidnap victim and himself by the midnight deadline?