In 1977 a group of young, horny, out-of-control Christians are spending a fun-filled weekend at the Happy Day Bible Camp. Their impure antics rile up a sadistic, crazy nun known as "Sister Mary Chopper". One by one these youthful sinners pay a BLOODY penance for their sinful acts. 7 years later, another group of Bible-totin' Christian wannabes return to the Happy Day Bible Camp. All ignore the warnings from the local folk of the grisly murders that took place 7 years earlier. Is Sister Mary Chopper dead or is she just waiting for backsliding Christians to commit sins of the unholy?—SCHROEDER/Cult Movies Magazine