The plot revolves around a group of guys who just pulled off a big heist and are lying low for a few days until they can divide up the loot and flee the country to pursue their individual dreams with their newly acquired wealth. They stop at a roadside pull-off to pick up some pre-arranged food and supplies for their hide-out and discover a girl (Aoi) who they assume was sent to deliver the goods. They pull her into their van, tie her up, and plan on holding her captive and taking advantage of her sexually, but over the succeeding days their number starts to mysteriously die and they begin to turn on one another in suspicion until they come to realize that they are the prey of the succubus-like sea ogre.

It's all fairly intriguing and Sora gets naked a lot, but I found her to be a little "too cute" to be convincing as the evil entity that she's supposed to be. Having seen her later work ("..The Wall") first, one can appreciate how she has matured in her craft and has gotten "hotter" with a little age and experience. All in all though, this was an enjoyable enough flick and worth a look.