Sharona's sister, Gail (Amy Sedaris), is starring in a play bound for New York, and Monk and Sharona are in the audience. During a scene, Gail uses a fake knife to "stab" another actor. The actor gasps and wheezes before falling to the floor -- but then doesn't get up. A doctor rushes onstage from the audience and determines that the actor was stabbed in the chest. Gail is immediately arrested and charged with murder. As if things weren't stressful enough for Sharona, her mother arrives for a visit. Sharona tries to push aside her feelings to prepare her mother for the news of Gail's arrest. As expected, Mrs. Fleming is beside herself -- her daughter is being accused of murder! She asks Monk and Sharona to help clear her daughter's name.