 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.