Sister Marina, a very unorthodox nun, is sent during the summer of 1994 to El Parral, a boarding school for boys threatened to be closed soon. Even though the kids welcome Marina with all kinds of pranks, they will, little by little, become something very close to the family they never had.

1939. A young art conservator from the Prado Museum is interrogated about a missing painting sought by a colonel. 80 years later, her granddaughter looks for her remains in a pit from the Francoist regime.