When a grenade is thrown into Miami restaurant, Tisano's, kills two people and injures others, the CSIs are brought in to investigate. Warren Ekerson was one of the dead and when his body is brought to the morgue another grenade falls out, almost killing Wolfe, Tara and Kyle. Horation questions the wife and son of Emerson & she remembers seeing a yellow car zoom out of the scene just after the explosion. This leads them to Ken Jarvik and none other than the victim's son, Steve Emerson. The two of them were working with the restaurant manager in counterfitting credit cards, using customers' receipts. The three of them were cutting in on the Russian mafia business and they decided to teach the three a lesson. Horation helps a waitress in the restaurant, Tonya Rush, get custody of her children back when the manager sets her up with child services after she refuses to help him with his credit card scheme.