A body is discovered, and appears to have been killed by a vampire. Meanwhile, Lassiter becomes romantically involved with a woman whom Shawn suspects is the murderer.

When the founder of "Right Now", Santa Barbara's oldest at-risk youth program, is shot and almost killed, Shawn, Gus and a few members of Gus's a capella group from college investigate to find the culprit.

After Gus is tasked with taking care of his girlfriend's son Maximus for the day, he jeopardizes their relationship when an innocent trip to the circus turns deadly.

The gang spends the weekend at a casino resort for a wedding and crosses paths with a local crime boss whose presence jeopardizes the impending nuptials.

Shawn and Gus are bummed to find out the owner of their favorite food truck has been murdered. The two of them go undercover to learn the food truck ropes and find out who the killer is. While working on the case, Marlowe visits them to cure a pregnancy craving and goes into labor at the most inconvenient time.