When Frank Beaufort receives a distress call from his old doctoral mentor, he agrees to investigate incognito. Valuable books and artworks are disappearing from the treasure chamber of the Erlangen University Library. However, the bibliophile gentleman detective soon comes across a dead body. Why did the scientist have to die? The deeper Frank Beaufort and his girlfriend Anne Kamlin delve into the mysteries of anatomical specimens, exotic plants, stuffed gorillas, and ancient statues, the more dangerous it becomes for them as well. The murderer is willing to do anything to protect his dark secret...