Friday and Gannon are working the day watch out of homicide when they respond to a late night call at the house of Jessie Gaynor. Her daughter Nora Hamlin is staying with her due to a separation from her husband. The call involves a gunshot heard from a locked study where Carl Hamlin's body is discovered. It is assumed at first that he killed himself but when Ray Murray from SID tells them that the bullet doesn't match the gun it turns into a murder case.