In medieval Tallinn, the famous knight of the Order who freed the Baltic Sea from pirates is murdered. The hero's head is chopped off and his mouth is stuffed with coins. The gold chain he bought the same day is missing.

The Sheriff orders Melchior the Apothecary, who can talk to the dead, to investigate the crime. The clever young man discovers that the murdered knight was looking for a mysterious "Prisoner of Tallinn" and clues lead to the Dominican monastery. A terrible series of crimes is unleashed - anyone who comes into contact with this secret is in danger.

At the same time, the apothecary has doubts about his apprentice, who seems to be hiding something...

The feature film Melchior the Apothecary is based on a popular novel known from the top of book sales charts. Screenwriters Indrek Hargla, Elmo Nüganen and Olle Mirme intertwined the characters and events known from the book "Apothecary Melchior and the Mystery of St Olaf's Church" 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.