Danny and Mac investigate after a briefcase belonging to Luke Sutton is found left in the NYMEX with a bloody note inside. Their investigation into Sutton's activities leads them to Nick Lawson, whom Sutton had been investigating for illegal trades, but who swears he had nothing to do with his disappearance. Stella and Flack investigate the death of Trina Rolston, a young pregnant woman who fell to her death from the roof of a church. With Hawkes help, Stella realizes that the body was thrown off the roof to mask the true cause of death. The detectives soon realize that their two cases are connected.