Kitap 1820 is about the experiences of a young man who is chasing a mystical book. Soner is a young man who claims to live under the name Yahya in 1820. Soner, who sets out to search for a mysterious book, sets out from Izmir to Istanbul in order to reach his goal. Soner, who embarks on a challenging adventure to find the book, which is under the protection of mysterious forces, finds himself in unexpected events.