A connoisseur of morality, honor and canons, which were still taught in Soviet times, returning from a business trip, finds himself in a compartment with a riotous and rollicking company. They will have to travel together. With the male part of the neighbors - passengers, the main character manages to maintain neutrality, but for the girl tender, tremulous feelings arise, which are also mutual. The hero is married! Will he now be able to adhere to the usual framework of morality? The rails are knocking, time is passing, the final destination is approaching, and the temptation is so great...