Our desires, aspirations, and ultimately our lives are too dependent on the biological processes of the body. Olga Lugovskaya comes to such a bleak conclusion at that age point, which is delicately called post-Balzac. But how can she live if human relationships, it turns out, are subject only to primitive laws? Everything that seemed so strong to her - a happy marriage, a kind and finely organized world - does not stand the simple test of age. Mom's advice probably won't help? After all, mom has a completely different “test” behind her – war. But there is still something in common in the destinies of different generations of the Lugovsky family - a single and very accurate tuning fork...