Tomás, an 11-year-old boy living in his own fantasy world, must use his vast monster knowledge to fight against his new English teacher: a wicked woman who is, in fact, a child-eating monster.
The lives of six girls belong to different worlds although connected to each other through a doll called Molly, whose existence dates back to 1976, when she appeared among the rubble of the great fire of the San Carlos orphanage, in northern Spain.