Hell In The Pacific

Vietnam: The battle-tested Seargents Casey and Lance have to accompany a young Lieutenant and a group of newly arrived teenage soldiers on a practice trip in the jungle. But the trip turns bloody serious when they are discovered by Russian scouts and have half a company follows hot on their heels.

Young doctor Garondet is summoned by renowned Professor Orloff. At Orloff's castle, Garondet discovers that the mad scientist has created an invisible yet murderous apeman.