Behind the city's prosperity, there are many social problems, including: Newcomers are unable to adapt to Hong Kong's education system, are discriminated against by their classmates, and end up going astray into selling psychedelics.　　Due to the breakdown of her family, the troubled girl spends her days wandering the streets, working as a karaoke singer for pleasure, and even fighting with others for her boyfriend.　　Youngsters from the lower classes, because of their underworld family backgrounds, like to use violence to counter violence, and are eventually rejected by the school and become "human ball students".　　Cheng Liren (Lo Ka-leung) aspires to become a social worker in order to save at-risk youths, and works actively with colleagues such as Szeto Man (Wong Hoi-yan), Yu Ka-lok (Wai Chun-kit), Cheng Chun-tung (Lok Ying-kwan) and Kwok Yiu-leung (Mak Cheung-ching) to counsel at-risk youths with selflessness and hope that they can return to the right path.　　In the course of handling the case, Jen experienced a communication problem with his father that had not been resolved for many years; In addition, he developed a deep love affair with female inspector Cheung Hoi Man (Chen Xiuwen). At work, at home and emotionally, Jen is facing different impacts.