New York’s Chinatown is disturbed by a fight between rival gangs of the Triad, the notorious Chinese mafia gang. There is a violent dispute between the bandits over possession of an ancient talisman which supposedly endows its owner with absolute power over other gangs. Looking into the case, Martin Mystère is taken prisoner by the charming Dragoon Lady, head of one of the fighting factions. With the aim of undermining his determination and enslaving him, Dragoon Lady puts Martin to the terrible test of the “thirty-six rooms”.