Odessa, August 1970. A heat wave. The city is full of tourists. Boris, a journalist and foreign affairs specialist, and his eight-year-old son Valeri arrive from Moscow to visit Boris' in-laws, Grigori Iosifovich and Raisa Irovna Davidov. But on the day of their arrival, Odessa declares a quarantine due to a cholera outbreak, and the city is closed off. Having come for a few days, the son-in-law is plunged into a worldchanged by serious danger. Family secrets will be disclosed, improbable events happen, and a great forbidden love starts.