In their last attempt to save their marriage, Sara and Óscar decide to take a short vacation in a cabin in the woods with their two children. But upon arrival, strange events corrode the tense atmosphere between them: a woman prowls the house predicting events that defy nature, which break the family from within as they confront unresolved problems from their past.

The film is inspired by a Mexican folklore story La Llorna, where a woman's ghost walks around waterfront areas, mourning the loss of her children.