On his twenty-first birthday, a prince is approached by his father (the king) and other courtiers. They present him a girl as birthday gift. The king asks him to enjoy sexual life and to produce the next heir. However, the prince experiences erectile dysfunction and is unable to perform sexually. He discovers that his sexual attraction is focused towards a long forgotten princess whose picture is hanging on the wall. He goes in search of this princess, and encounters many people along the way. Ultimately, he finds the princess and is able to perform sexually with her.