Gehenna: Where Death Lives

A group visits Saipan on a business trip to search for locations for their newest resort. As they find what they think is the perfect spot, they discover a an unusual area on the property that reveals to be a hidden Japanese bunker from WW2, which they decide to explore. However, things take a turn for the worst once they meet the inhabitants of the bunker and each member faces their inner-demons and the secrets of the bunker itself, the results lead to a shocking conclusion.