The protagonist of the film, Ewa, is a beautiful and innocent young woman who is deeply in love with her fiancé, Lukasz. When Lukasz goes to Rome to seek a divorce from his previous wife so that he can marry Ewa, she decides to travel across Europe in search of him.
During her journey, Ewa encounters a series of tragic and devastating events. She is seduced by a manipulative artist who impregnates her and then abandons her. Ewa is forced to give up her child for adoption, adding to her emotional turmoil.
As Ewa continues her search for Lukasz, she falls into the hands of various men who try to take advantage of her vulnerability. She becomes entangled in their selfish schemes and is betrayed multiple times.
Throughout the film, Ewa remains faithful to her love for Lukasz, despite the heartbreak and hardships she faces. The Story of Sin explores themes of love, loss, betrayal, and the struggles of a woman in a male-dominated society.