从特殊学校启光学校欲透过举办音乐剧来提高毕业生就职机会开始。在校的音乐老师徐宝雯(谷祖琳饰)在面对这个计划,随着演出日子逼近压力加深。音乐剧同时找来名校萃英中学学生前来协助,但最终只有在班中成绩未能赶上的钱思颖(余香凝饰)继续当上义工,但却要面对家人与学校的压力。同时在成绩中下育才中学孔老师(欧锦棠饰),带来新移民陈丽与透过当义工「洗底」的吴珈豪(岑珈其饰)来协助。珈豪与思颖最初对音乐剧的态度,却随着在校同学的尽力演出,渐有改观。Ms Tsui (Jo Koo) is a music teacher in a special education needs (SEN) school, who is not able to switch to a mainstream school due to stereotyping and labelling; Zoey (Jennifer Yu) is an underachiever from a Band 1 school, who is struggling for the coming public examination; Ka Ho (Kaki Sham) is a rebellious teenager from a Band 3 school, who idles away his time and doesn't care about his handicapped little brother - - When being assigned to helm a musical performance, Ms Tsui has to bite the bullet while juggling between work and personal issues; for the sake of earning higher school credit, Zoey volunteers in an extracurricular musical; to avoid being expelled, Ka Ho has no choice but to attend a musical in a SEN school. Three individuals take part in a musical they deem worthless for their own purposes, which turns out to be a journey of self-discovery towards their dreams and goals.