When a family of con artists stages seances to bilk rich widows out of their money, Pete and Mac decide to enliven the game. The distaff members of the Simon family stage seances to con rich widows and widowers into investing their money in the stock market through their 'broker". The Simon family conduct "seances" on unsuspecting people, including a kindly lady whose nephew enlists Pete and Mac to expose the con artists. They come up with a plan, including a costly loan of $100,000—at 10 per cent interest per week—from a loan shark they know. They fake Pete's death, and Mac, posing as his father, remorsefully attends a seance for the big windup.

Pete and Mac try to get a hijacker to reveal where he and two partners hid a stolen armored car carrying $900,000.