Pierre (Hardy Krueger Hardy Kr ü ger) is a former French Air Force pilot who loses his memory when his plane crashes in a battle. He returns to Paris after the war and leads a monotonous life with his girlfriend Madeleine (Nicole Courcel), but is beset by amnesia and postwar syndrome. Until one day, he met a little girl Sieber (Patricia Gozzi) who was sent by his father to the monastery, and learned that Sieber had been abandoned by his parents. Pierre began to pick her up at the monastery every weekend by pretending to be his father. They played together on the banks of the Seine. They had their own secret words and even their own rituals. Sieber's simplicity and clarity seemed to inject sunshine into Pierre's miserable life. His mental wounds were also slowly healed. However, this pure friendship attracted suspicion, misunderstanding and criticism from outsiders, even complaints from monasteries and the intervention of the police. On a serene Christmas Eve, Pierre and Sieber snuggled up to each other by the river, but neither of them knew what was waiting for them behind the night. This film won an Oscar and Golden Globe Award for best in 1963.