A state investigator is gravely wounded on the docks. The FBI is brought into the case when it's clear the matter is tied to La Cosa Nostra. A vessel has been revamped into being a cruise ship, with illegal gambling. But the mob is after bigger game. La Cosa Nostra has set up a promising politician to be blackmailed, with the intention of gaining control of a state. Erskine goes undercover as a passenger on the cruise ship. But a member of Cosa Nostra's high commission is also aboard -- and he can recognize Erskine.
—Bill Koenig