Summer of 1939. Zosia (Michalina Łabacz) is a young polish girl who is deeply in love with Ukrainian Petro (Wasyl Wasylik). They great love will be put to the test, when her father decided to marry her to wealthy widower Skiba (Arkadiusz Jakubik). Right after wedding she is left alone because her husband is drafted to polish army for the war with Germans. Meanwhile tensions between living side by side Jews, Poles and Ukrainians grows. The girl is a witness to an increasing number of acts of violence. Culmination of this tentions will be a slaughter of polish people by ruthless bandits of UPA and polish actions of self-defence.