Autopsy reveals that the death of a recent arrival from Europe was caused by a burst baggie he had swallowed, one of over 70 bags of heroin found in his stomach. Luther Mahoney MUST be involved somehow! Munch gets a tip from a con that a body is buried under the track at Pimlico, but eventually finds the "dead" man. The Mahoney problem is solved.

Beau Felton's body is found. Was it suicide or murder? Was he part of a criminal operation or...? Megan Russert returns from France to help in the investigation. Pembleton discovers why Bayliss has been missing from the squad room so much.