Colter investigates the disappearance of two amateur storm chasers, one of whom is the daughter of an old family friend, that the local police have written off as an accidental drowning. Colter's expert tracking skills lead him to uncover the seedy underbelly of a small town resort.
Henry's friend refuses to report his son, Brandon, missing after the son steals 30,000 dollars. Shawn agrees to help locate the son, and finds out that Brandon has been involved in some underground poker. Meanwhile, O'hara tries to surprise Lassiter on his birthday.
A local weatherman is found dead the morning after a tryst and his lover is charged with his murder despite her claims of innocence. Shawn is intrigued and becomes a defense consultant in order to gain access to the case.
When Lassiter doubts his own crime-solving ability, Shawn tries to boost his confidence by helping him solve an astronomer's mysterious death.
Gus is ecstatic when it turns out the only real clue in his and Shawn's missing-person case is TriCon, the comic book and science fiction convention currently running in Santa Barbara. As bodies start turning up, they must balance their newly-scammed and increasingly onerous duties as George Takei's assistants with finding the killer and saving the teenager.
The duo's latest case, a gag from Lassiter, turns from an alien abduction investigation to a murder case with the discovery of naked body. Between tanning salons, speed dating and Henry disagreeing with their prime suspects, it's possible Lassiter will solve the case before Shawn and Gus can.
Henry's old captain believes he's solved a murder, but his Alzheimer's has caused him to forget the most important details: the crime, and who committed it. Henry calls in Shawn and Gus who find themselves investigating a murder that happened decades ago and only the faulty memory of the retired officer gives them any hope of closing the case.
Shawn reluctantly settles for a private client who claims a ghost has it in for him after Lassiter kicks Gus and him off the much more interesting case of a murdered psychologist. The two investigations seem to be running parallel and Shawn may still end up solving the police's case.
Shawn and Gus attend a Civil War reenactment rehearsal for the sheer pleasure of watching Lassiter have a nervous breakdown as he runs it. When a scripted death turns real they end up donning uniforms themselves in order to find the murderer and perhaps prevent another.
With a tenacious cop on their tails, the man and Luci race to find the mystery caller. Meanwhile, Helen makes inroads in her investigation but finds herself held back.