The series "Open Door" tells the story of a destructive friendship between two women. Svetlana lives in a happy marriage with a man named Viktor, designs clothing, and raises her daughter Ira. But one day, Svetlana's younger brother Boris brings his beautiful fiancée, the mysterious Zhanna, into their home. She immediately seems familiar to Svetlana, and soon she discovers that her new relative is actually her old school friend Laura, who has somehow changed her name and appearance. The arrival of Zhanna-Laura turns the family's familiar life upside down.