The film is set in mid-1960s Crimea. Three male friends from Moscow —a veterinarian (Roman), diplomat (Vadim) and physicist (Stepan)—decide to go camping on the seashore. Once arriving at the coast of the Black Sea in their car, they select a deserted area to settle and set up their tents. Refusing all benefits of civilization, they enjoy bathing in the sea and preparing their own food from concentrates, until their privacy is invaded by two uninvited guests – a trainer and an actress (Zoya and Natasha) – who claim their rights to the young men's campsite. Deciding to make camp life as intolerable as possible for the three men, Zoya and Natasha set up camp in an attempt to purge the three friends from the seashore. Ultimately, the war for territory ends with a complete reconciliation of the two sides.