Danielle Darrieux stars as Arabella Delvaire in this baroque adaptation of Pierre Benoit's novel Bethshabee. Arabella is a woman of the world who arrives at a remote Foreign Legion outpost for a rendezvous with her current lover, Captain Duveuil. It so happens that one of Arabella's previous amours, Captain Somerville (Paul Meurisse), is also serving at the same post. So much for joining the Foreign Legion to forget. A climactic knife duel "solves" the film's various plot complications. Despite its Foreign Legion background, Bethsabee has next to no action, which must have made things difficult when the film was distributed to the U.S.

Back from a stay in the Far East, a woman who knew the names of the chiefs of a drug ring is murdered. Georges Masse, the famous reporter, decides to investigate, accompanied by his faithful photographer P'tit Louis. He will come across some unappetizing characters like M. Dubois, a killer, Luigi Costelli, a dangerous trafficker and a beautiful but dubious lady, Suzanne Wilson. After being himself suspected, Masse will make the truth triumph.

This Moroccan romance is a kind of Arab Tristan and Isolde: the heroine kills herself when she is convinced no one cares for her, the young nobleman she thought would love her is killed by a madwoman.