伊萨克（维克多·斯约斯特洛姆 Victor Sjöström饰）从医50年，现年已是将近八十岁的高龄，正准备在儿媳的陪伴下返回母校接受荣誉学位颁发。路上伊萨克顺道重游旧地，追忆往事。 伊萨克曾经和堂妹萨拉（毕比·安德森 Bibi Andersson饰）有过美好的初恋，却因性格冷酷孤僻，以致他的兄弟乘虚而入。如今伊萨克坐在草坪上，忆起往昔，眼前浮现萨拉白衣飘飘的美丽模样。 他与生俱来的冷漠理智的性格，注定了婚姻的失败。伊萨克的妻子无法忍受冰冷的婚姻，寻求外遇。这样的家庭气氛，加上遗传下来的冷漠秉性，使得伊萨克的儿子不愿生小孩，和儿媳关系决裂。 伊萨克获得了光荣的学位荣誉，然而他仍然沉浸在对过往沉重的自省中，对于生命将尽的老人，这仿佛是一次心灵救赎之旅。

Atka Natas is a secret agent from the oppressive regime of Liquidatzia. He visits his estranged wife Vera, a chemist who is involved with a group of exiles trying to smuggle their compatriots out of Liquidatzia. Almkvist, an honest local policeman and former lover of Vera's, contacts her while investigating the death of one of the refugees. Natas has a list of agents operating in the host country and wants to sell them to the Americans. However before he can do so, Vera tries to kill him, after an argument about getting her parents out of Liquidatzia.