In this magical and chilling adventure, we meet a young orphan who, after the death of his parents, moves in with his grandmother to a picturesque house in a coastal village. The grandmother, a charming and wise woman, tells him stories about diabolical creatures that disguise themselves as ordinary women: witches. Although he is skeptical at first, the boy's life takes an unexpected turn when he stumbles upon a secret convention in a luxury hotel, where a group of witches, led by an evil and cunning supreme witch, gathers.