Zhao Runnan

While she copes with the pressures of her final examinations, a bullied teenage girl forms an unlikely friendship with a mysterious young man who protects her from her assailants.

When a human skeleton is discovered after a bridge collapse, a murder case from years ago is revealed. The daughter of the deceased, Wen Xiaoyu, is assisted by a boy, Meng Chao, in her quest to trace the cause of her father's death.

After reporting criminal leader Wei Tianlang, Gu Dahe's disappearance and his sister's suspicious death triggers Lei Yang, the criminal investigation unit captain, to step in and uncover the truth.