After feeling to win back his girlfriend in New Jersey Mark returns to San Francisco where Natalie has set up an office for Monk and Peter consultant detectives. It's time to stop bickering and get to work only tenant Amy duffelin comes to them for help. I disgruntlet employee came into work and started shooting killing three co-workers and leaving a female hostage severely wounded. After spotting the shooter through office Windows the police lost him leaving Lieutenant Dublin with the real mess on her hands. Visit in the bedroom Survivor Monk finds her to be helpful cooperative and quite Charming as well. But the more he and Natalie try to track down the Salem the more he seems to have disappeared from existence altogether.