A top secret microfilm is smuggled via a cigarette and a meatball (don't ask!) into the collar of one of a pair of black panthers being transported by "Quain" (Howard Duff) from Europe to the United States. When their train is derailed and the panthers escape, "Quain" and his newly found journalist pal "Catherine" (Märta Torén) - whom we know to be not quite all she seems - soon find themselves at a local mountain hotel where the prospects of a panther hunt attract both the army and a few colonial-types who fancy a bit of a big game hunt. The arrival of "Paradou" (Robert Douglas) reinforces th...