Detective Taylor and Lindsey Monroe delve into a murder during the Feast of San Gennaro with ties to an oil company. Detective Flack and Hawkes investigate a mysterious case of arson where a 10 year old boy died of smoke inhalation.

A young woman gets on an elevator with an older man. When the door opens on his penthouse, he is shot by an unseen person. The girl is not hurt and the team must track her down as she is the only eye-witness of the murder. Stella and Sheldon Hawks fish a body out of a pond in Central Park. The man, however, did not die from drowning. He suffered a fatal allergic reaction.