John Milwood has been dating Mary for some time but her father, the wealthy Henry Bovelasco, manages to separate them. John start hanging out Gonzales’ bar, in reality a drug dealer who is forced to ask for his help disposing of the body of an American agent. In reality John is also a federal agent sent to Tangiers precisely to bring an end to the drug trafficking in which a police officer is also involved. Miraculously escaping an ambush set up by the very same corrupt policeman, and thanks also to Mary’s help, he manages infiltrate the gang and reveal the true identity of its ringleader…

Some more background info courtesy of Wikipedia and author/journalist Roberto Curti…

Freda dismissed the film later in his life, describing the film as devoid of interest and a troubled production which he blamed on producer Antonio Cervi. Freda and his crew arrived in Tangiers for location scouting, and found that the agency that was supposed to pay for their accommodations had failed to meet their agreement. Freda and his crew eventually left for Madrid, and after about a month of no headway being made in the production, the Spanish co-production company asked Freda if the whole film could be shot in 18 days. Freda said he could and finished the film in sixteen days. The film was entirely shot in Spain.

The film was the debut of Spanish film director Jorge Grau. Grau recalled that he was hired as a second assistant director as he spoke fluent Italian but described his job as just “chatting with the director.” Grau recalled that the crew was split into two later into production with half shooting in Tangiers led by the first assistant director, and the other half which included Freda and Grau. Grau stated that Freda left for one day as his lover called him from Madrid threatening to end their relationship if he did not come to visit, which led to Grau to complete shooting. The scenes Grau filmed he described as very small, such as a car arriving at the port of Malaga and the foot pressing on an accelerator.

Locandina

Official censor report courtesy of ItaliaTaglia

The censor report (above) requests the following cuts:

Adequately reduce the torture scenes of the secret agent (repeated violent punches on the bleeding face and stomach, electric hot boils applied on the chest)