Navarra, Spain. Alba has just turned thirty and is about to enjoy a weekend with her boyfriend and her friends in an isolated country house, but soon she will notice that this particular weekend is not at all like any other that she has lived before.
It follows Marina, a young girl that has been trying to escape the ghosts that follow her after a tragic event. She goes to Edén, a clandestine company located in the middle of nature to put an end to her suffering.
On a cold winter night, Laura reads her brother David the story of a strange creature that attacks children. Suddenly, a shiver runs Laura's body, feeling a strange presence in the house. It's him.