What are the things which unite and divide a 40-year-old son, currently in a trouble-free relationship, and his aging father, a former scientist whose memory is burdened by two wars and a host of other historical and private absurdities? The bond which has been developing between them for over 40 years has its distressing yet also humorous moments, its obligations and even its mysteries – and it’s still not certain that they can avoid making the same mistakes again and again…