A dead body surfaces this week, and neither Shawn, Gus, Lassiter nor Woody know how it got there.
After a retirement party for a cop they didn’t know, Shawn, Gus, Carlton and Woody wake up in the Psych office with no recollection of the events of the night before. There began their journey to beat the clock to solve the murder before they are implicated for their unexpected connection to the victim, while trying to piece together what happened to them. Chaos and hilarity ensues as they find out what happened.
Shawn also discovered that he called Juliet during the night's events and has asked her to move-in. Amidst the blitz to solve the murder, Shawn and Juliet decide to hold off on the big change for a while.