Briscoe and Curtis clash with Pembleton and Bayliss, who have come to New York to investigate a subway explosion resembling an unsolved bombing in Baltimore from five years ago. The investigation soon leads to a larger conspiracy.

A jogger killed in Central Park turns out to be the second wife of a former comedy club owner, who was acquitted of killing his first wife. And convicting him this time may hinge on tracing the path of a Colombian coin used as a subway token slug.