追击8月15

探员何若智（郑中基 饰）认识了少女陈美玲（蔡卓妍 饰），原来这个少女是个机械人。之后又来了一个从50年后来的陈美玲机械人，她要确保科学伟人何小明的亲哥哥在八月十五日死去，何小明才会因为哥哥的离世而发愤图强，根据自己妻子的模样研制出陈美玲系列机械人，而若智正是何小明的哥哥。若智惶恐不安之余，更被警队上司（黄浩然 饰）陷害与杀害警察的案件有关，若智只要逃走。制作假护照的美玲与若智之前遇到的机械人完全一个样子，若智误以为她也是机械人，所以决定要假意追求美玲，好让自己不用死去。八月十五那天如期所致，美玲是真心爱着若智的，愿意代替若智死去，才发现原来历史被改写了。Office Yohji Ho meets a female android who comes from the future, in a drug raid. The android's mission is to ensure the death of Yohji, the elder brother of the future "Father of electronic Chips", so as to help the future scientist to become what he will be. At the meantime, Yohji is suspected as the murderer of a police officer. Scared and confused, Yohji flees and goes to Mei Ling, who looks identical to the android, for a fraud passport. Knowing Mei Ling is his brother's future wife, Yohji decides to kill her to save his own life. Being pursued by the police and the android , Yohji runs away with Mei Ling and starts their adventure.