Ambitious cops try to prove themselves into their high-stakes careers, in the smallest mistake can have deadly consequences. At the crux of the close-knit band is perfectionist before he burnt on the job Andy McNally, whose dad was a homicide detective. The show follows Andy and her four colleagues -- Traci Nash, Gail Peck, Dov Epstein and Chris Diaz -- as they experience the trials, triumphs and tribulations of police work, as well as its effect on their lives.