After the repeated disappearances of oil company prospectors in the swamps of an unnamed Caribbean island, private detective Smith (James Dunn) is bought in to find out what is going on. This is not to the liking of the authorities, who think the men just died of natural causes in the swamp (though we know thats not true). When people aligned with Smith start dying, and Smith himself has attempts on his life, it is clear that something big is going on, and involving buried treasure...
A decent little crime B-movie. Modest but well made and the plot moves swiftly enough to keep your attention. There are plenty of potential suspects and the film manages to keep some good surprises until the end, though the finale is a little rushed.
An enjoyable film, though the plot is not anything out of the ordinary and indeed is pretty similar to a number of other films but still worth watching.