Synopsis
Penrod and Sam spring into action after a member of their junior G-Men Club loses his mother in a bank shoot-out. Since the club is pledged to solve crimes and bring crooks to justice, the boys set out to capture the killers -- but are instead captured when the killers hide out in their clubhouse. After Penrod's rival, Rodney, is also captured, the three boys join forces to hatch a daring plot and outsmart their captors.