In visiting his ex-wife’s apartment a man learns that she plans to remarry a scientist named Valentin Shlyakhov. In his past, the man wrote a scathing letter about Shlyakhov which greatly impacted his career. Fearing that this information will come to light when his ex-wife marries Shlyakhov, the man insists that the wedding be called off. What follows is an intimate portrayal of the relationship between a man and a woman (who are never named), whose history as husband and wife plays out during a heated conversation.