In the middle of the night, Monk receives a phone call from a drunken Stottlemeyer, who has gone to Las Vegas with Disher for a fellow officer's bachelor party. Stottlemeyer believes that a wealthy casino owner has murdered his wife, but he needs Monk's help to prove that the death wasn't an accident. Unfortunately, when Monk arrives in Vegas with Natalie the next morning, Stottlemeyer