Shapur, Khosrow's close friend and a painter, tells Khosrow of the Armenian queen Mahin Banu and her niece Shirin. Hearing Shapur's descriptions of Shirin's flawless features, the young prince falls in love with Shirin, the Armenian princess. Shapur travels to Armenia to look for Shirin. Shapur finds Shirin and shows the image of Khosrow to Shirin. Shirin falls in love with Khosrow and escapes from Armenia to Khosrow's capital Mada'in; but meanwhile, Khosrow also flees from his father's anger and sets out for Armenia in search of Shirin.