Oliver Platt is defrauding his firm Bulmont Investments, not just out of greed but revenge as his father killed himself when a similar firm, for whom he worked, would not give him a loan to pay off his debts. Alan Corwin, an auditor, tumbles to Oliver's deception and demands a quarter of a million in hush money. Oliver puts the money in a brief-case along with a bomb, due to go off at six o'clock when Corwin will be in an aeroplane.