Joseph Sheridan le Fanu's tale, "Inn at the Flying Dragon," brings dark fantasy, ghostly apparitions, and mysteries to the TV screen. It's part of his well-known collection, "The Dark Mirror," published a century ago, yet still captivating readers today. Bohumila Zelenková drew inspiration from this novella, not just for its mysterious and romantic elements but also for the characters' intriguing portrayal of the post-Napoleon era—a time when many sought greatness, even if it meant embracing deception.

The thrilling story begins in 1318, during the reign of John of Luxembourg, when the Czech nobility rebelled against the king. However, the lord of Zlenice, Oldřich of Zlenice, did not join the resistance. He summoned the surrounding nobles to his castle for negotiations... and in the morning he was found dead. He had been murdered in his chamber, which was locked from the inside!