O'Hara goes to Mexico undercover to assist Mexican Authorities in identifying a Drug Courier due to arrive there from another country. This illegal drug shipment is due to be transported to the USA which is why O'Hara becomes involved. O'Hara gathers information to make him believe the local Carnival may hold a key to further investigation. O'Hara takes a position at a booth to allow him to follow up on his suspicions and ends up dealing with other carnies. His actions result in conflict endangering his life in order to reach the conclusion of this investigation.