Alex Cross' son, Ali, is eager to follow in his father's footsteps as a detective, but when his best friend goes missing, what price will he have to pay to solve the mystery?

Matthew Bannon, a poor art student living in New York City, finds a duffel bag filled with diamonds during a chaotic attack at Grand Central Station. Plans for a worry-free life with his gorgeous girlfriend Katherine fill his thoughts--until he realizes that he is being hunted, and that whoever is after him won't stop until they have reclaimed the diamonds and exacted their revenge.