When Fidel Castro allows thousands of Cubans to depart for America in the Mariel Boatlift, he exports the worst criminals and undesirables of his country along with them.

To monitor the situation, the CIA sends infiltrators to Cuba—where they vanish without a trace.

In desperation, the Agency turns to ex-Navy SEAL Dusky MacMorgan to go in and find out what happened. Amid the chaos and deception in Mariel's savage underworld, MacMorgan must keep on his toes and off the radar if he’s going to discover the truth without disappearing himself.