Monk‘s beach resort vacation with Sharona and Benjy turns into work when Benjy witnesses a murder. But with no body to be found and ""the cleanest crime scene in the history of crime,"" Benjy can‘t convince anyone except Monk and the hotel‘s kooky security chief that he‘s telling the truth. Believing that Benjy‘s imagination is working overtime and determined to enjoy her vacation, Sharona takes unneeded tennis lessons from yet another Mr. Wrong while Monk and his new assistant follow what turns out to be a false lead. Benjy spots the body only to have it disappear again, and the security chief reveals Monk‘s own room to be contaminated with some of the ""fourteen bodily fluids"" detected by her sonar machine. When Monk figures out who stole four bags of lime from the grounds supervisor‘s shed, he solves the case. Unfortunately, his time at the hotel is almost up and the body still has not been found.