Adderly accepts the role of mailman in order to carry some valuable documents to another agent.
Melvin instructs Adderly to keep a watch on his sister. However, Adderly refuses to believe she is danger until a murder attempt on her occurs during a TV interview.
Adderly gets embroiled in a power play. Two black bureaucrats lay out a scheme to depose a Haitian ruler by making him appear sick through a voodoo enchantment.
Adderly makes it on a newscast when he is filmed by an unscrupulous journalist lady following him while he attempted nabbing a hired killer who carried a bomb.
Adderly meets a female G.I. intent on finding some plates used on a forgery years before. Some clues have led her to a funerary parlor.
A government employee falls to his death while being chased by two security guards from his own office. Adderly helps the widow to clear her husband's name.
A Russian agent, a ringer posing as Adderly, is intent on snatching some top secret documents from The Miscellaneous Affairs Agency. It seems the enemy chiefs think the agency is a cover-up. Mona begins to suspect the bogus Adderly.
Adderly is assigned to travel to Montreal and protect the life of an Eastern bishop. There he runs into two people, a pretty actress and the Russian killer who crushed his hand.