Holly wants to pursue more exciting cases, so she convinces Charlie to investigate a robbery ring. However, Charlie has doubts about relying on Holly's tactics, which involve looking for the culprits at a popular nightclub.

The gals are tasked with proving a house isn't haunted by spending the night in it, and Holly approaches the case with a much more serious attitude than Charlie.

A reporter interviews Charlie and Holly, who recall how they reunited and became crime solvers when a devoted fan witnessed a crime and reached out to them about it.

The gals go undercover at Holly's high-school alma mater in order to stop a senior-class prank.

Holly's seemingly perfect sister visits, so Nick tries to bolster Holly's confidence with a phony case.