Nacho is ten years old and he's just moved to a new flat. His parents are delighted with the new area, the new neighbours… Especially with the lovely old lady downstairs, who seems to be the perfect grandma everybody wants living in their building. But Nacho doesn't quite agree. The old lady frightens him, she throws him vicious looks and whispers nasty things when nobody can hear. She is cruel and hateful… and nobody will believe him. Elvira has them all fooled. A two-faced grandma and a boy who is discovering the boundaries of respect for his elders is a recipe for lots of fun.