Cruel customs reign in the world of Midsairu. If you don't kill, they will kill you. The little thief Azoth was convinced of this the hard way, otherwise he would never have become an apprentice to Darzo Blint, an assassin. Like anyone who has embarked on this path, the young student changes his name. Now he is not Azoth, but Kylar, and in order to truly master the profession, he needs to awaken his witchcraft talent. Meanwhile, events occur in the kingdom that do not bode well for its inhabitants. The crown prince is killed, the ka'kari, a silver ball capable of making a person invulnerable to any weapon and prolonging his life indefinitely, is stolen, and the enemy army is at war with the kingdom itself.