The story is about a drug ring and the finally successful efforts of the Paris police to break it up. A young detective goes into a den in Paris' Chinatown, following a clue, and that is the last seen of him until his body is found floating in the Seine several days later. The only clue is a woman's glove. The dead man's friends on the force vow to avenge him, and receive information leading them to suspect one Sandra, a beautiful foreigner, played by the stunning Marcelle Chantal.