Man accidentally eats a woman's chocolates bar on a train

Returning home from a shopping trip to a nearby town, bored suburban housewife Laura Jesson is thrown by happenstance into an acquaintance with virtuous doctor Alec Harvey. Their casual friendship soon develops during their weekly visits into something more emotionally fulfilling than either expected, and they must wrestle with the potential havoc their deepening relationship would have on their lives and the lives of those they love.

Country girl Nadia moves to the city and becomes a maid in Valya's apartment. Valya, who is a member of the local District Committee, does not know that Nadia fell in love with her currently absent husband, a geologist named Maksim, when he had visited Nadia's village during a recent expedition.