In the third film of medieval thriller, Melchior's wife Keterlyn witnesses a brutal attack. The life of an unknown young man is saved, but the victim who has lost his memory does not know who he is and how he ended up in Tallinn.

A ring found at the scene leads Melchior to the night brotherhood, the bizarre troupe who performed on Fair Day also raises questions. Frightening signs suggest that not only the unknown recovering from the attack is in danger, but also Melchior and Keterlyn, who are treating him.

At the same time, the pope's envoy, known as a ruthless witch-hunter, arrives in the city...

The Melchior the Apothecary trilogy is based on the popular novels about Apothecary Melchior, known from the top of book sales charts. In the screenplay for the third film, the screenwriters Indrek Hargla, Elmo Nüganen and Olle Mirme intertwined the characters and events known from the book "Apothecary Melchior and the Hangman's Daughter" with completely new and exciting twists and turns created for the film.

The film is directed by Elmo Nüganen (Names in Marble, 1944), and produced by Taska Film (O2, Fred Jüssi. The Beauty of Being, Winter, Class Reunion, Names in Marble, 1944), Nafta Films (O2, The Secret Society of Souptown), Apollo Film Productions (Winter, Old Man Cartoon Movie, The Bog) and HansaFilm (Truth and Justice). The film about Melchior the Apothecary is made in cooperation between Estonia, Germany, Latvia and Lithuania, the co-producers are Maze Productions from Germany, Film Angels Productions from Latvia and InScript from Lithuania. Cinematography by Mihkel Soe, Production Design by Matis Mäesalu, Film Editing by Marion Koppel, Music by Liina Sumera, Visual Effects Supervisor Jan Viljus.