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

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.

When Sam Tyler receives a phone call that presents him with three tasks he must perform so he can return to his life in the future, he must weigh his alternatives and decide whether to stay in 1973 or go home.