The squad's effort to hunt down a killer results in the death of a well-regarded policeman, a tragic turn-of-events that causes Grace and her colleagues to confront their own mortality issues. Meanwhile, death-row inmate Leon, granted time with his son, mulls over the boy's possible adoption by the mother's new boyfriend.

Grace investigates a possible negligent homicide involving a bus accident that resulted in the deaths of three children, but the case takes a backseat when multiple tornadoes touch down in Oklahoma City. Stormy Grace serves as a first responder during the crisis and helps a trapped twister victim, who's aptly named Dorothy. Meanwhile, Rhetta gets trapped in the morgue; and Leon considers becoming a Muslim.