Martha Beck, an obese nurse who is desperately lonely, joins a “correspondence club” and finds a romantic pen pal in Ray Fernandez. Martha falls hard for Ray, and is intent on sticking with him even when she discovers he’s a con man who seduces lonely single women, kills them and then takes their money. She poses as Ray’s sister and joins Ray on a wild killing spree, fueled by her lingering concern that Ray will leave her for one of his marks.

For their honeymoon, newlyweds Cliff and Cydney head to the tropical islands of Hawaii. While journeying through the paradisaical countryside the couple encounters Kale and Cleo, two disgruntled hitchhikers and Nick and Gina, two wild but well-meaning spirits who help guide them through the lush jungles. The picturesque waterfalls and scenic mountainsides quickly give way to terror when Cliff and Cydney learn of a grisly murder that occurred nearby and realize that they’re being followed by chance acquaintances that suspiciously fit the description of the killers.