Six employees are sent back to primary school for a retraining program, joining real fourth-grade students in Class 4S. As unlikely friendships form and personal growth unfolds, a rule-breaking incident threatens it all.
Alton Wong
Fai
Serene Lim
Miss Yee
Colin Chan
HR Cheung
Mak Pui-Tung
安哥
Jacky Tong
Gau
Ko Hon-Man
葉一禾
Wilson Ai Wai
蔡小棋
Giann Law
Even
