John Anderton is a top 'Precrime' cop in the late-21st century, when technology can predict crimes before they're committed. But Anderton becomes the quarry when another investigator targets him for a murder charge.

Robert McCall is a former agent of a secret government agency who is now running his own private crime fighting operation where he fashions himself as "The Equalizer." It is a service for victims of the system who have exhausted all possible means of seeking justice and have nowhere to go. McCall promises to even out the odds for them.

Zharko, leader of the Romanis in NYC, passes his position of leadership on to his unwilling grandson, Dave, leading to infighting between Dave and his father.

Frank Serpico is an idealistic New York City cop who refuses to take bribes, unlike the rest of the force. His actions get Frank shunned by the other officers, and often placed in dangerous situations by his partners. When his superiors ignore Frank's accusations of corruption, he decides to go public with the allegations. Although this causes the Knapp Commission to investigate his claims, Frank has also placed a target on himself.

Swope—the only black man on the executive board of an advertising firm—is accidentally put in charge after the death of the chairman.