In a year in which Marlene Dietrich was breaking all stereotypes as an actress and as a woman by becoming a US citizen and Orson Welles was presenting the best allegation on the loss of power in his masterpiece Citizen Kane, Europe was drained in an all-out war led by big dictators in which treason, death and violence corrupted all layers of society. Nineteen Forty-one is a tribute to one of the hardest years in the history of the twentieth century.

Julia, a woman suffering from a degenerative sight disease, finds her blind sister Sara hung in a basement. Despite all signs pointing to suicide, Julia decides to investigate what she intuitively feels is a murder case.

After two years away, Hache returns to Barcelona seeking a fresh start. Falling for Gin while facing unresolved feelings for Babi, he must confront love, loss, and who he's becoming.

In the harsh post-war years' Catalan countryside, Andreu, a child that belongs to the losing side, finds the corpses of a man and his son in the forest. The authorities want his father to be made responsible of the deaths, but Andreu tries to help his father by finding out who truly killed them. In this search, Andreu develops a moral consciousness against a world of adults fed by lies. In order to survive, he betrays his own roots and ends up finding out the monster that lives within him.