To build an innovative sex app and win a tech competition, a sexually inexperienced student and her friends must explore the daunting world of intimacy.

Summer of 1939. Zosia is a young Polish girl who is deeply in love with Ukrainian Petro. Their great love will be put to the test when her father decides to marry her to a wealthy widower Skiba. Right after wedding she is left alone because her husband is drafted to the Polish army for the war with Germany. Meanwhile, tensions grow due to Jews, Poles, and Ukrainians living side by side.