When the students arrive at the academy, they find that they have been assigned to different classes based on their performance in the previous day's tests. The students are divided into four classes, and the head teacher is zhou yan. The head teacher gives the students a soul bone as a reward for their performance. The soul bone is also a fusion bone, which can be used to fuse two soul bones. The group also receives a secret path bone, a bone that can be fused with another bone. .