An intimate relationship between 17-year-old son, Dau Denis and his mother Nora. Dau at the time of the action turned into a semi-paralyzed old man watching the life of the Institute from the window. Young scientists enjoy spring and dance in the courtyard of twist and boogie-woogie; Denis happily laughs a lot. His begins with serene erotic games with housekeeper Anya. Sex with the mother becomes a natural continuation of extremely close and trusting relationships. Nora, Denis and Anya spend peaceful evenings at a common home table.