The story draws the legend of a dybbuk, a malevolent spirit that refuses to leave the human world and inhabits the body of a person.
Casey Beldon was jogging and suddenly, there is a blue glove on the trail. She picks it up and turns around to see a boy, with a blue glove missing from his left hand. After Casey blinks, the boy turns into a dog with a mask on walks into the forest, Casey followed and finds the mask on the ground, with the string buried in the dirt. She finds a glass jar with an unborn baby inside it. Suddenly, the unborn baby opens its eyes is Casey is plaqued After that, Casey baby-sitting Matty, her neighbor's son and supposedly taking a nap. While on the phone, she heard a voice saying "Some people are doorways," on the baby monitor used for Matty's baby sister. Casey goes upstairs to check on them. Matty was holding a mirror to the baby's face. After being hit with the mirror, Casey's eyes begin to change color and learns that she had a twin brother who died in the womb. Casey suspect that she is being haunted by her dead twin that wants to be born. She met a woman named Sofi, who is revealed to be her grandmother. Sofi explains that she had a twin brother who was killed in Nazi experiments in Auschwitz when they were young). The boy was brought back to life by a dybbuk who intended to use his body as a portal into the world of the living. Sofi killed her twin to stop the dybbuk, and now it haunts her family for revenge.Sofi introduced Rabbi Sendak to Casey to performed the exorcism to remove the dybbuk and finally the dybbuk is drawn back from the human world and with Casey's boyfriend killed, she soon finds out that she is pregnant by him, with twins.