While helping a young client get his Star Wars Collector Action Figure back from a wealthy man, Shawn finds the action figure and a dead body in the mansion. He puts on his psych act and tells the police there is a crime at the mansion.
Shawn, Gus, Lassiter, and Woody leave a boring party and create their own fun. They wake up in the Psych's office without a memory of the night. They find various clues which they do not understand, and learn there is a dead man involved.
Lassiter is approached by a beautiful woman who seems interested in him, and then she disappears. Shawn and Gus investigate a string of murders which appear to have been committed by a vampire. Lassy's new girlfriend seems mysterious.
While working a case, Shawn & Gus also plan a birthday party for Juliet. They find out her absentee father is in town, and hope to reconcile Juliet and her father as a gift. The father is a con man who has trouble toeing the line.
Shawn and Juliet go to a lover's retreat and meet an overly romantic couple. The couple are scam artists who recently high jacked a motorist. Shawn and Juliet end up working the case. Gus, Lassiter, and Henry spend a restless weekend in town.
Shawn & Gus are hired to watch what seems like just a wall. They get distracted, and of course that is when someone breaks through the wall after stealing valuables inside. The search is on for a missing dagger.
After Lassiter moves into a new condominium building and strange things start happening to him, he is forced to hire Shawn and Gus to figure out what could be causing the supposed paranormal disturbance.
When a contestant on a reality dating show is in a car accident that wasn't an accident, Shawn & Gus are hired to find out who is causing problems on the show. Shawn & Gus act as contestants in order to get close to the suspects.
Gus and his former a cappella group perform at a charity event. Shawn has an appendicitis attack and goes to the hospital. When the host of the charity event is shot, Shawn has to work the case from the hospital. The a cappella group helps.
A funeral mortician discovers a problem with an autopsy performed by Woody, the police coroner. Marked as an accidental death, she thinks it is a murder. Shawn & Gus investigate the problem to help Woody so he does not lose his job.
Thane is released from prison after testimony from his trial is thrown out and the charges dropped. Thane wants to find the real criminal; he hires Shawn and Gus. Juliet originally handled the case. Now Shawn and Juliet butt heads to solve it.
Arriving at a crime scene with a dead body, Shawn sees another victim that he connects to an unsolved case of his father's from 20 years ago. Henry works with Shawn and Gus. As the murders are solved, Shawn realizes his father is in danger.