 17-year-old Mari is going out to to see a concert with a friend named Phyllis. On the way they encounter a group of murderers and are abducted by them, what follows is the horrific sexual abuse, torture and murder of the two girls. After the killers murder the two girls they take shelter in a house owned by a married couple not knowing that they are the parents of Mari, when the parents find out what the killers have done, they carry out a horrible, gruesome revenge.