劇情:

故事圍繞著三個成績中等的學生，偉傑(李創銳飾)和弟弟阿寶以及偉傑最好的朋友健仁(洪賜健飾)，這三個受到輕視的青少年都有自己的困擾。阿寶年少天真，父母的讚美對他而言就是世界的全部，不管所做的事情是對還是錯；而就讀工藝學校的偉杰喜愛用他擅於發明機械的才能，來戲弄老師和同學們；因為母親的忽視而誤入歧途的健仁陷入了龐大的負債中，為了償還債務，他未尋求母親的幫助，反而替高利貸集團跑腿做事。為此偉杰和健仁想出了發明“收債機器”的點子，讓收債機器代替他們去噴漆討債。見識過“收債機器”的威力，卻不知道不良集團的首腦Boss Ma(巫啟賢飾)其實還打算用升級後的機器來走私毒品。眼看著學生踏上歧途，老師CK(陳曉東飾演)決定挺身幫助自己的學生。

Synopsis:

          Wei Jie and Jian Ren are best friends, and they both face their share of family problems; Wei Jie has a gambling addict father and his mother who does not think highly of him always condemns him. Jian Ren comes from a well-to-do single parent family but has an estranged relationship with his mother. He becomes rebellious to spite his mother and even becomes a runner for the loan sharks. They both share the talent and interest on gadgets inventions but their efforts are never recognized. Their lecturer, CK tries to build a rapport with the boys but ends up being snubbed. His patience pays off and the boys end up seeking help from him for their family problems. CK even help the boys to create an invention for a competition. However, their invention is misused by the loan sharks and in an attempt to stop that, CK, Wei Jie and Jian Ren’s lives are at risk.