A soft, cute, but intelligent apprentice with rich inner world X an icy and strict handsome master. In order to pursue the cool and aloof prince charming on the train, Dong Zhi made great efforts and managed to pass the exam to join the government department that deals with demon and monster – The Demonic Creature Extermination Department. Not only did he work himself to exhaustion, but he also came close to losing his life several times. He managed to evade countless dangers and obstacles. Isn’t this man too hard to pursue?