Monks 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 cant convince anyone except Monk and the hotels kooky security chief that hes telling the truth. Believing that Benjys 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 Monks 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 supervisors shed, he solves the case. Unfortunately, his time at the hotel is almost up and the body still has not been found.