My Dreams Connect to the Shadow World

My family has always hidden an ancient taboo that cannot be said. This strangeness buried deep in the blood never happens to everyone easily. Only grandma, and me as we grew older, were inexplicably chosen by invisible fate. A long time ago, the past that was sealed away by the whole family caused grandma to fall into an endless abyss. From that moment on, my parents unanimously chose to hide it, keeping all dangers out of my world, and just wanted me to live a safe and smooth life. No one ever told me that those bizarre recurring dreams were never just a fantasy. The secret opportunity sealed deep in the bloodline is the only key to the other world. A very small number of ancestors in the clan were once led to a desperate situation in another world by unknown forces, and from then on their lives were tightly shackled by a different fate.