Shawn and Gus are at a restaurant having lunch, or more like breakfast in Shawn's case, who is eating cereal in an attempt to break the "Breakfast Served Until" barriers. As Shawn launches into his usual flirting routine with the waitress, Gus calls him on never taking relationships seriously. So Shawn, in an effort to prove him wrong, calls Abigail Lytar, his high school crush he reconnected with at his reunion, and asks her on a proper date. The guys are then summoned down to the police station. The Yin Yang Killer, a serial killer who was active when Henry was a cop then went silent, is back and wants to toy with the department again, this time singling out Shawn as his primary playmate.