Detectives Washington and Fitch investigate a double homicide at a pharmacy; Longford and Mahajan try to track down the killer of an attorney who had many enemies; the investigations culminate in a high-speed pursuit.

A local football star is murdered; an unpopular groom disappears during a boisterous wedding reception on a boat.

When they investigate a woman's murder, Fitch, Washington, Longford and Mahajan stumble upon something much bigger; a murdered teenager is found along with his severely beaten father, a Vietnam veteran.

A woman in an SUV is shot multiple times while hiding a 2-year-old in the back of the vehicle; a college janitor with drugs in his system is found dead.

A nemesis from New York shows up in Detroit, agitating Fitch; an entire family is murdered; Longford starts to reconsider his retirement.