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.

A body of a woman, Emma, in a black party dress is found in a dumpster. Her head is wrapped in packing tape. When the ME examines the body, he finds that her eye lids have been removed. This leads Mac to a recently released serial killer with the same MO. The second case possibly involves the Russian mafia. Lindsay and Danny team up to unravel the truth.