Nora is used to living within the confines of her own system. Using this logic, she has built not only a business but also a personal life. However, her perfect world crumbles in an instant when her husband Ivan dies. Only after his death does Nora discover that their relationship was not as idyllic as she believed. Ivan led a double life: attending tango lessons and cheating on his wife with the passionate dance instructor. By nature, she is the complete opposite of Nora. Determined to understand what happened, Nora decides to investigate on her own and enrolls in the school her husband attended. She enters a completely new world that reveals her relationship with her late husband from a different perspective.