A young woman is killed in a flashy car riddled with bullets in a quiet Atlanta suburb; detectives Quinn and Vince can tell this was a shootout with multiple gunmen, and left to determine whether she was the intended target, or a mistaken identity.

A shooting in a rap studio leaves one man dead and several critically injured; Quinn and Vince take over the cold case and must restart the investigation from the beginning to figure out who is responsible for the murder and robbery scheme.