With Julia Ogden in jail awaiting execution for the murder of her husband, Murdoch, Brackenreid and Crabtree work to locate James Gillies who they are certain concocted this devious plot. Murdoch and Brackenreid have to work from home and Chief Constable Giles has suspended them both. Crabtree and Dr. Grace try to figure out why there was no gunpowder residue on the dead Darcy Garland. They manage to show how Gillies could have pulled it off but Judge Matthews remains unconvinced and refuses to issue a stay of execution unless there is direct proof of Julia's innocence. As the clock ticks down toward her execution, Murdoch revisits the murder scene and is taken prisoner by Gillies who gives him a choice: Julia can die or he can die and she will live.