A conman is shot to death, and detectives discover a large "Noah's Ark" behind his house. Meanwhile, an anti-cigarette protester is killed when somebody sets his cigarette outfit on fire.

At a French Revolution themed fund raiser at the UN, specifically at the French consulate, Mac, Stella and Hawkes find themselves hurdling diplomatic road blocks investigating two murders leading to an unexpected suspect. Meanwhile, Danny and Lindsay reunite on a "blinged" out cockroach that lead to murder of a prominent chef.