Washington, D.C. Detective Alex Cross is called to solve the case when a Black Lives Matter activist is killed in cold blood.

With Cross hot on his heels, Ed Ramsey sets up a new locale to perform his kills, as the Cross family continues to be tormented by a mysterious someone connected to Deirdre Nolan.

A fresh lead sends Cross to Philly with his son Damon. Along the way, father and son reconnect through the shared grief over Maria's death.

Cross realizes that his attempt to protect his family has put them in more danger. He races against time to rescue the people he loves.