At first, no one believes Shawn when he claims that a murder took place at his and Gus's high school reunion, mainly because there's no body. As he puts the pieces together, Shawn must also deal with his old flame Abigail (Rachael Leigh Cook), whom he apparently stood up back in high school, and shows a side of himself never seen before. Henry continues to try and reconnect with his ex-wife Madeleine (Cybill Shepherd), and in the process shows up at the reunion. Also guest-stars Serinda Swan as Eileen Mazwell.