In an attempt to discover the common denominator between the eleven victims of a serial killer, Monk links them all to a jury trial six years ago in which a handyman fell off the roof of a wealthy homeowner's pool house. Meanwhile, Sharona finds that dating the deputy mayor can have many benefits but in his anxiety to make a statement to the press, the twelfth juror is mistaken as a suspect in the killings, possibly ruining the deputy's reputation.