After being forced to take a desk role in the office, Flute decides to lead a double-life and become a dog-themed superhero named McSnuff.

Flute enters the Grimsburg Miniature Competition and is accused of murdering the judge, Jebediah Cupps, after he disqualifies him. Flute tries to clear his name at the local middle school by recreating a miniature model of the crime scene. Then Stan joins his school's Trauma Club.

The Grimsburg police department goes undercover at a wedding to catch the notorious bouquet-catcher killer. Kang, Summers, and Wynona try to perform convincingly as the wedding band but Flute is distracted when Harmony catches the bride's bouquet, putting her in the killer’s crosshairs.

A murder mystery party becomes all too real for the Grimsburg PD when the wealthy, eccentric host is killed. During the investigation, Flute finds himself threatened by Stan’s detective skills, Summers tries flirting with Wynona and Kang and Pentos form an unexpected bond.

Flute and the team get the campy horror movie experience when, after a series of counselors are found murdered, they attempt to make the town’s summer camp slasher-proof. Meanwhile, Harmony tries to get Stan outdoors and away from screens.