An experimental submarine with a very experienced crew, the “Siren II” is sent to find out what happened to the “Siren I” after it mysteriously disappeared in a submarine rift….

People are dying mysteriously and gruesomely, and nobody has a clue what the cause is. Only health worker Mike Brady has a possible solution, but his theory of killer slugs…

A woman, raised by an Amazon tribe after they killed her parents, seeks revenge on the tribe for their deaths by joining an expedition looking for the tribe’s secret golden…