When an aspiring musician is found dead behind a trash can, Detectives Lupo and Bernard find a bag full of cash, leading them to a slew of suspects, including Don Sorenson. Sorenson confesses to shooting the musician when it is revealed that his daughter is thought kidnapped, but the clues don't seem to match up when his daughter, Jill Sorenson, appears back at home after losing her cell phone. Using the stolen cell phone as a guide, the detectives link the case with a bigger terrorist scheme, which could put lives in danger. Meanwhile, Lt. Van Buren begins to seek treatment for her cancer.