The lives of Amaia, Lidia, Argi, Beatriz, Elena and Marta belong to different worlds, although connected to each other by means of a doll named Molly, whose existence dates back to 1976, when she appeared among the rubble of the great fire at the San Juan orphanage. Carlos, north of Spain. Molly accompanies each of our protagonists through their own nightmares, witnessing all of it and being part of the horrors they face, changing their lives forever.