The murder of a returning Vietnam veteran has Lieutenant Hunt outraged, as he demands a quick resolution to what quickly becomes a complicated and controversial case. As Sam and the squad's team of detectives explore the circumstances surrounding the homicide, Tyler is sent down a mysterious path that may provide clues about his own family's past and why he is back in 1973

Sam finds his mother, Rose, in debt to a local mobster known for killing women that cause him trouble. Sam finds out the cops of the 125 are in cahoots with the mobster and ignore his illegal activities for tips on other mobsters.

When the baby of a prominent family is kidnapped for ransom, Sam Tyler is shocked to discover that his own father, Vic Tyler, may be involved. Sam's discovery leads him to face some deep dark secrets about his childhood.

Ray's shady brother may have played a role in the number of recent decapitations in which the squad is investigating. but other suspects pop up too, such as a biker, a Wall Street executive and badly disfigured man.