When a bank robber hands a teller a photo of her kidnapped son, she quickly hands over the money in order to save his life. Uncovering details, Morales and Jaruszalski soon become suspicious of the kidnapping. When a second bank is robbed with the same motive, a potential suspect comes to the surface and the team finds themselves in a dangerous situation -- and one of their own pays the price. Meanwhile, DDA's Dekker and Rubirosa disagree with DA Hardin's prosecution strategy, so they devise their own game plan so the bank robber is behind bars for good.

When a crazed gunman open fires during a rally with State Senator Celeste Kelman, seven innocent people are killed including the Senator. With the help of modern technology, the detectives identify a solid lead and possible motive for the shooting. At the DDA's office, tensions are running high when Dekker and Rubirosa disagree on how to handle the case. Meanwhile, TJ gets himself into a sticky situation as he continues his quest to find his dead partner's killer.