Peggy, a former addict, who decides to make a new start after the death of her beloved mother with whom she lived in the small desert town of Yucca Valley, California, makes a life-changing decision to become a private investigator.
As the NCIS team searches for Gibbs after wreckage from his boat is discovered, they find out he was tracking a serial killer with journalist Marcie Warren, who wrote an exposé on him.