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 the threat to the beasts and to anyone who gets in the way of those malevolently determined to secure this (pretty robust) little document. What now ensues doesn't auger very well for these lithe and beautiful creatures, nor for "Quain" and "Catherine" either unless they can keep alert and stay one step ahead of their rivals. The beginning of this is quite fun, the middle portion quite intriguing, but the concluding third of the film is all just a little bit too formulaic. The presence of Douglas does little to enhance any sense of jeopardy, but he does always manage to exude a degree of nastiness and that compensates a little before the denouement. The production is rudimentary - lots of fairly obvious green-screen effects that suggest they never left California, but in the end it's a watchable, amiable, crime thriller that passes seventy-five minutes effortlessly enough.