In a barbershop in San Francisco that belongs to the mafia, the barber and four mobsters are shot dead, and the press calls "The Barbershop Massacre". Sharona is in a garage with Monk discussing the repair of her car. When they leave the shop, the mobsters "Fat" Tony Lucarelli and his associate Vince "invite" Monk and Sharona to visit his uncle, the mob boss Salvatore Lucarelli. He wants to hire Monk to find who killed his friends at the barbershop. Monk refuses in principle, but soon FBI Agent Colmes invites Monk to work infiltrated in the mafia. In return, he would help him to join the police force again. Monk begins his investigation going to the crime scene with Sharona, Stottlemeyer and Randy, and then he interviews the witness of the massacre, Phil Bedard, who works at the U.S. Mint. Phil discloses the symbol of a Chinese gang on the jacket of one of the killers, and they become suspects. Meanwhile, Sharona flirts with "Fat" Tony and they have dinner in a date.
—Claudio Carvalho, Rio de Janeiro, Brazil