When a womanizing finance executive is found stabbed to death after a night at the opera, Elsbeth suspects an obsessed opera lover was driven to murder because of a ringing cell phone. Meanwhile, Elsbeth, Captain Wagner and Kaya must adjust to changes in the precinct as the consequences of Noonan's wrongdoing continue to loom.
When a billionaire dies in a freak accident during a space training simulation, Elsbeth suspects a fellow magnate and wannabe astronaut with a grudge named Neal is responsible. Also, Elsbeth’s day is turned upside down when she is reunited with a former colleague from Chicago.
When a former child star turned party girl Mac wakes up on Halloween after a wild night on the town with no recollection of her whereabouts and afraid she may have committed murder, Elsbeth and the team retrace her steps to find the truth. Meanwhile, Captain Wagner must address low morale at the precinct.