A woman is forced to continue working while one of her colleagues lies unconscious on the floor due to the long, hot work days. This fact causes insomnia problems and the suspicion that something is happening at night.

At the outbreak of the Spanish Civil War, the nun Maria is forced to flee her convent. She takes refuge in a brothel, until it is liberated by a woman's anarchist group. Maria joins the group and eventually goes to the front. The women's group faces the problems of fighting not only the nationalists, but also factions on the left seeking to impose a more traditional military structure.

Four years after his disappearance, the mysterious case of Nacho, a young and promising painter, is reopened by the police.