The Demonic Sealing Record of the Ruins Realm

In order to help his father detoxify, he went out to look for medicine but was blocked by a killer organization. In order to protect all of them, he died in the battle and led the burning soul... Later, I learned about my mother's whereabouts and worked hard to find her. However, when I found out about my mother, I also learned that the world is a huge cage... Is he a seal against monsters? Or kill... Does he have this strength again? How should he break out of this cage barrier... Will his master be able to find his way back...?