Mitsu: A film about the mysterious lady of the castle, Countess Mitsuko Maria Thekla Coudenhove-Kalergi, who was the first Japanese woman to come to Europe at the turn of the 19th century. She lived mainly in the border region near the Bavarian border and managed the castle in Poběžovice, the property of her late husband, Count Heinrich Coudenhove-Kalergi. She was a strong and educated woman, but she never lost her longing for her native country.