After teenage Han Li and Zhang Tie fail to join the Seven Mysteries Sect, a physician takes them in as apprentices. But their mentor hides a dark secret.

While Han Li saves Li Feiyu and learns that all of Mo's previous disciples have vanished without a trace, Zhang Tie overhears Mo plotting with Yu Zitong.

Han Li lies about his progress when Mo returns with a ghastly puppet. After reaching the sixth level, can he survive an attempt to possess his body?