A robbery goes wrong and the situation becomes more complicated when the stolen diamonds go missing. Suspicion centers on a construction site, and Pepper goes undercover as a caterer to try and discover who at the site has the diamonds.
When an old woman is killed for her possessions, Sgt. Pepper and the crew find that a group is using "the oldest trick in the book" to fool grannies out of their money.
Suspicion for the murder of two factory employees falls on two co-workers: a compulsive gambler who had a fight with one of the victims, and an enigmatic college student who disappeared on the night of the crime.
A group of con artists who prey on car crash victims choose the wrong patsy — Pepper, who awakens in the hospital after being knocked unconscious by a speeding car.
A drug pusher's sale of particularly potent speed causes several overdose deaths, and creates an emotional crisis for the criminal's guilt-ridden girlfriend.