A massacre outside a corner store leaves two dead and two clinging to life. With no witnesses, Miami detectives hope the surviving victims live to tell who pulled the trigger. In Cleveland, a man is found strangled in his apartment. Detectives go on the hunt for one of his friends and uncover a shocking motive.
In Dallas, Detective Brian Tabor investigates the brutal stabbing of a man found in a vacant apartment. Now, detectives need a woman who may have lured him to his death, to come clean. Then in Birmingham, a wild gunfight leaves an innocent young man dead. Detective Jody Jacobs is on the hunt for two shooters and needs to determine who fired the first shot.
In DeKalb County, a keyboardist for a local church is gunned down in his home. Detective Lynn Shuler uncovers a web of lies that ultimately puts him on the path of the killers. Then, in Miami, rookie Detective Mario Gonzalez responds to a call about a man found shot dead in an abandoned car. Just as the case is about to run cold, a witness comes forward that shatters the case wide open.
In Miami, a young father is gunned down after a night of gambling. Detective Emiliano Tamayo has to figure out who would have killed him over twenty dollars. Then in Dallas, a child's birthday party turns deadly. The investigation becomes even more urgent when Detective Leo Gonzalez discovers the killer may be on the way to Mexico.
In Birmingham, Lead Det. Henry Lucas and the Birmingham Homicide Team are trying to solve the mystery of how a young man ended up shot in the back in the middle of a scrap yard. With no witnesses, Lucas hopes the victim's friends can lead him to the killer. In DeKalb County, Lead Det. Lynn Shuler and the Major Felony Unit are called to a motel where a woman has been found dead. The case takes a dark turn when the team learns that a man was in the room shortly before the woman died, but had since disappeared.
In Birmingham, Detective Chris Anderson investigates the gruesome murder of a woman who is shot to death and then set on fire. Anderson hunts down his suspects, but it's the victim's family that reveals a final, disturbing twist in the case. In DeKalb County, Detective Joe Renaud is working the homicide of a father of four, gunned down outside an apartment complex on the east side of town. Without little to go on, Renaud and his team must put the pieces of this puzzle together to track down the killer.