When the abduction of an American architect in Rome appears to be connected to a brewing terror threat in New York City, FBI's Jubal and Nina join FBI: International's Forrester and his Fly Team in Italy, as they work together to find the missing American and shed light on the terrorists' U.S. target.

The Fly Team heads to Vienna to find the culprit of an acid attack on a rising American prima ballerina. Also, Smitty receives some troubling intel from a familiar face.