The fate of the young Czech Marketa was predetermined from her very birth. The daughter of a barber, as well as the owner of a bathhouse, she had to, like her mother, become a bathhouse attendant - help visitors wash and allow them all sorts of liberties. But one day her fate changed dramatically... To the town where Marketa lived, the illegitimate son of Emperor Rudolf II, Don Julius, who was subject to terrible attacks of madness, was brought for treatment. He needed medicinal bloodletting, which was to be performed by the local barber, Marketa’s father. However, the unpredictable happened - the king’s son was inflamed with an insane passion for a pretty commoner. Marketa decided to use this feeling to restore sanity to the patient. Everyone around her unanimously told her that crazy people couldn't be trusted. But the girl didn’t listen to them...