That day, he transmigrated into a body that was not his. That day, he encountered a fog that blocked everything. That day, he arrived in a completely different world from the one he was used to; he now found himself in a world with strange phenomena occurring. Will he be able to achieve something extraordinary? In a world full of dangers and hidden existences, his existence seems to be hidden among any branch of any leafy tree. Still, a strange, gently flowing river seemed to drown his sorrows and give him some visibility in a world full of mysteries.