A TV producer has developed a movie based on the events of Monk's capture of Steve Wagner in "Mr. Monk and the Astronaut." They have hired renowned actor David Ruskin to play Monk. However, to get into the role of Monk, Ruskin shadows his character for a couple of days as Monk investigates the linked homicides of a young woman killed in her apartment and a pawnshop owner shot dead during a robbery. However, things get bad when Ruskin gets a little too into the role of Monk. He begins to act out the character's behavior and becomes obsessed with the case. His obsession leads him to make decisions that could harm his family and friends. As a result, he is forced to confront his actions and decide whether to continue playing the role or return to his normal life.