Where's The Million Dollars?

Peter Zandocus was sent to jail for three years for tax evasion, but will get out a year early for good behavior. He will be released in a week. Sidney Hagen of the IRS, fraud division, is convinced that Zandocus stashed away a million dollars before going to jail. He sends a special agent, Ray March, to cozy up to Norma Jean Fryburger, the girl who testified on Zandocus' behalf and who Hagen believes is holding the money out of fear for her life.