The bandit Kriminal accidentally discovers in an ancient porcelain statuette a fragment of a map relating to the place where a famous outlaw, before being executed, had managed to hide two precious canvases.

However, the statuette is in the hands of two adventurers, Mara and Robson, who, in turn, try to snatch the map fragments he recovered from Kriminal.

An agreement is finally reached by the three: they will join forces to bring to light the hidden paintings and share the proceeds equally.

Kriminal, Mara and Robson then leave for Beirut and, in an archaeological area of the city, they find the precious paintings.

[7] In a retrospective review, Italian film critic and historian Roberto Curti noted that "despite a disappointing second half, which again transforms the movie into a banal travelogue adventure [...] Il marchio di Kriminal is ultimately more successful than its predecessors in conveying the feeling of Magnus & Bunker's grimly ironic comic book.