Faced with a string of nine brutal murders, all with different MOs and no apparent similarities among the victims, Captain Stottlemeyer calls in Monk to help him investigate. Suspicion falls at first on Henry Smalls, an insurance agent whose calendars appear in three of the victims' photographs. But as Monk, accompanied by Sharona and her new boyfriend, Deputy Mayor Kenny Shale, waits in the dark for Smalls to return home, he helplessly witnesses a fatal stabbing in which the suspect becomes the victim. Rushing after the murderer, who is wearing a ski mask, Monk tries futilely to subdue him, but all he's able to discover is that the murderer bites his fingernails. As the number of victims rises to eleven, the diversity of the victims, combined with the fact that they all live in Marin County, suddenly causes both Monk and Stottlemeyer to realize that they're all members of a jury. The ensuing investigation leads them to a six-year-old personal injury case, won by the plaintiff, who is...