A nun performs an exorcism on a pregnant woman which turns out to be unsuccessful. Unfortunately, the evil returns.

赛尔万多和艾尔玛任性的姨妈艾丽西亚拼命抢夺圣诞节的控制权，家庭海边之旅就此陷入疯狂

During the mid-1970s, in the Mexican state of Guanajuato, authorities discover a clandestine burial ground. The corpses are from murdered prostitutes. The suspects are three sisters known as "Las Poquianchis".