To Be No. 1: Shepherd.

When Ying was young, she was the girlfriend of a gang leader. Due to her willfulness, her boyfriend tragically died, and to make up for her mistakes, she became a social worker. The senior social worker, known as Fu, resented himself for failing to discipline his son properly, which led to his son succumbing to the pressures and dying from drug abuse. Fu vowed to save troubled youth.