Returning to the high school where they have graduated for a decade, Pong and Kwong, who once were best friend back then and now facing their own uneasy phase of life, were brought together again by the pass of their class teacher Mr Lo.

The return to the school would reveal their life-changing moments piece by piece, hence resolving the unfinished misunderstanding between the forgiving teacher and the rebellious students.

Could the song unsung be heard again? Could the decade of underdogs be reversed?