The series "Don't Swear Off Fate" is a Russian melodrama about sincere love and betrayal. Nina and Grisha are young lovers who dream of the perfect wedding. However, Nina insists on strictly adhering to all traditions, including abstaining from living together or being intimate before marriage. Grisha values their relationship greatly, so he reluctantly agrees to these conditions. But one day, the couple accidentally meets Nina's beautiful and audacious childhood friend, Katya. Now their love must withstand a test.