Amidst a serene island getaway in the tropical southern seas, a grieving couple grapples with the loss of their sole child. Yet, for Seiichi Kirishima, the husband harbors a sinister agenda on this trip – to end his wife's life and hide her remains within the dense woods. However, as his scheme unravels and his wife flees, Seiichi pursues her into a foreboding cave, unwittingly sealing his fate as he becomes the prey of a ravenous beast lusting for human flesh.