Shawn and Gus receive a mysterious email asking them to come to a Cinnamon Festival in Dual Spires, a town so small it's written in parenthesis on the map. After meeting many of the colorful residents, including Robert and Michelle Barker who run the local diner and Sheriff Johnson, who questions how they heard about the Festival since they deliberately keep it simple in their town, they make their way to the square where the Festival is being held.
Juliet surprises Shawn with tickets to Scare Fest, an event at the local theme park that hasn’t taken pace in 15 years. But Shawn already had tickets to go with Gus. Not wanting to let either one down, Shawn decides to go with both on separate nights, but doesn’t tell either one. Shawn already has enough tension built up with having to tell Gus about his and Juliet’s relationship. He doesn’t want either relationship to suffer because his attention is now divided.
Shawn and Gus receive an invitation from Desperaux to visit him in British Columbia, but there's a catch: Desperaux is still in prison. But after much convincing, Gus agrees to go with Shawn on the free trip. Fresh off sharing a kiss with Juliet, Shawn is faced with telling her his feelings before she leaves for the Amalfi Coast with her boyfriend Declan, and before he and Gus leave for British Columbia. However, Shawn misses his chance after McNab tells him that Juliet asked him with help with her passport, meaning she already left for Italy.
Shawn and Gus find themselves in the midst of a Bourne Identity-like hunt and chase after a U.S Government Spy named Nadia seeks their help in finding an agent who's been off the grid for quite some time. The agent she's looking for is Strabinsky - the only person in the world who has successfully erased his identity. Nadia needs to be erased too, as the government is chasing after her, trying to capture her for something she claims she didn't do. Shawn is quick to trust her because she mentions Ewan O'Hara's name, and because she's a sexy government spy.
Shawn, after a night in of drinking and listening to the chick-lit book series 'Internity' on audiotape, stops into a coffee shop with Gus before they are to be at a crime scene. Shawn, worse for wear, tells the barista that he will be getting his free since he will guess the trivia question again as always. However, he is beaten to the punch by Declan Rand, a handsome and charming man. Shawn wonders who he is as he leaves, but soon finds him across the street at their crime scene. Declan, it turns out, is a criminal profiler, brought onto the case by Chief Vick.
Shawn and Gus board a ferry bound for The Channel Islands. They’re volunteering for environmental cleanup, along with other nature lovers and a group of four prisoners on work detail. After Gus gets seasick, he and Shawn take a wrong turn, then run into CRAIG, the prison guard, who has been tied up and gagged. Craig tells them that the prisoners he was guarding escaped and are loose on the ferry. Shawn calls Henry and tells him the news. Craig, Gus, and Shawn find themselves in a standoff with the prisoners, who are demanding to be let go on the life raft.
We flashback to 1990 SBPD. Herb Wilkins, the Chief of Police at the time, is giving then detective, Henry Spencer, a lecture on his mistake on a case. Herb ends up firing Henry off the case and replaces him with SBPD's star detective team, Peters and Boone.
Shawn and Gus show up at a crime scene at a swanky mansion where a young bachelor, Lance, just fell to his death. Lassie doesn't believe it was murder, but Shawn thinks otherwise. He notices that Lance's ankles and arms were not broken, causing him to believe that he didn't try to brace his fall and was therefore dead before his body touched ground.
We open with Young Shawn, Young Gus and their super nerdy friend Dennis making a visit to SBPD to see Henry. They tell him they saw a weather balloon that could pass as a UFO. Henry does not believe them.
A car is pulled out of the river with a dead woman inside. Lassiter and Juliet are investigating the crime scene. Shortly after, Shawn and Gus arrive on the scene. Shawn looks more closely in the car and determines that the dead woman wasn't in the car alone, and therefore hypothesizes that she was murdered.
Gus tells Shawn he has to get to tap class. Lassiter overhears and inquires about it. At the tap class, Gus is surprised to see Lassiter show up. Lassiter insists Gus let him take the class with him as a means to follow through on his therapist's orders to try something new.