Following her mother's, Ah Heng's, instructions, Yao Yao takes the keepsake, the Mountain-Returning Bell, and her spirit cat Hajimi to Qingwu Mountain to seek help from its guardian, Yin Xuan. Strange incidents begin occurring in the once-peaceful mountain forest, as living creatures mysteriously lose their voices one after another. After investigating step by step, they discover that all these strange occurrences were orchestrated by Cen Wujiu. Yao Yao, Yin Xuan, and Hajimi continue gathering clues and investigating Cen Wujiu's conspiracy, embarking on a journey to find and rescue Ah Heng.