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.