Event BOOK OF HOUR takes place in a library plagued by the occult and paranormal activity. There is no combat in the melancholy role-playing adventure, but the main character will escape from danger and solve puzzles. Until the disaster inside the library happened, this place was a fortress of knowledge. The fire destroyed most of the collection, and the librarian died trying to protect the precious books.

Thanks to his unique talents, the protagonist is able to restore the collection and place it on its former shelves. Occult books can be collected by purchasing them, solving puzzles, or using unusual abilities. By studying the contents of non-standard works, the user will be able to unravel the mysteries of the environment and learn more information about the library. Many books have become cursed; because of this, they will need to be cleaned or “dark” stains removed.

The central character will meet with visitors, and each of them will ask for help. The gamer will be able to choose their paths and stories, giving seekers knowledge that will help them rob tombs, sabotage intrigues, or use the power of persuasion. The Librarian has great influence that extends far beyond the walls of the House of Silence. Depending on the user's choices and actions, the plot may take a different path.