(Crossover episode with CSI: Miami, Season 4 Episode 7.)

Horatio Caine follows Henry Darius to New York so that he can keep his promise to a young boy in Miami, but by the time he and Mac are able to locate Darius he has disappeared again, leaving behind six more bodies. A link to the younger sister of one of the victims who was also Darius' hostage turns out to be a dead end, but Mac and Horatio soon find the connection between Darius and his hostage, leading them to a psychiatrist who had treated both.

Lindsay, Stella, and Mac are on the case of a dead ADA, who they discover, is involved in a "kill war" with water guns. Meanwhile, Danny and Hawkes investigate the murder of a young lady who had a penchant for suing restaurants and taking them for all they are worth.

A man dressed in a superhero costume is found dead in an alley, after saving a man being mugged. Mac, Stella, and Dr. Hawkes find his clothes in a nearby phone booth. Danny and Lindsay investigate the murder of an NFL first-round draft pick, known as "Superman."

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?