When I Opened My Eyes I Found Myself In a World That Wasn't Mine

After death, I never imagined I would open my eyes to a new life. And I certainly never expected to find myself reborn in the body of a baby... I remember nothing about my previous life. Who was I? Where did I live? How did I die? I don't know. The only thing I know is that I now live in another world. A world surrounded by walls. What are the people in this world so afraid of that they live behind these walls? I want to find out. I want to understand this world I was never meant to belong to...