After a bartender is murdered The CSI team must prove that Hawkes did not commit the murder. That only becomes more difficult when the team is pulled off the investigation.

At a French Revolution themed fundraiser at the UN, specifically at the French consulate, Mac, Stella and Hawkes find themselves hurdling diplomatic road blocks investigating two murders. Meanwhile, Danny and Lindsay reunite on a “blinged” out cockroach that lead to murder.

Trouble begins for Mac when Clay Dobson becomes a free man due to a mistake he made. Stella learns the results of her HIV test from Adam.

Mac believes he can fight the internal affairs investigation that is about to be started against him because of what happened to Clay Dobson. Can Mac explain what happened to the suspect he was chasing and will it be good enough for him to keep his job? Also Stella could lose her job as a CSI after a cold case is somehow connected to her.

Can the team clear a tennis legend of murder? Also Mac believes that the continuing investigation into what happened with Clay Dobson is nothing but media pressure. Can friends and colleagues help save Mac Taylor’s career before it’s too late?

When a guidance counselor is murdered at a private school, the mayor orders Mac and his team to drop everything to find out what happened. Mac is frustrated because he can't devote the man hours or the personnel to finding the "Taxi Cab Killer".