Jesus and Maria José are siblings living in the house of their father, recently deceased. This routine is interrupted by the arrival of Magdalena, their paternal half-sister. After many years without being with her brothers, she comes from Spain to claim her share of the house inherited from their father. However, the brothers, who do not want to sell it, start playing wicked games with her, in which it is difficult to distinguish who has the stone, who has the paper and who has the scissors (jankenpon).