一个两岁的孩子雷达在1998年的某一天走失,父亲雷泽宽(刘德华饰)从此开始了长达十四年的寻子之路,途中历尽艰辛,偶然遇到了四岁时被拐的修车小伙曾帅(井柏然饰),两人一同踏上寻亲之路,途中两人建立了父子般的情谊。。He works at the fairground as “Stump the Guesser”, who can guess anything for a fee. But suddenly his tricks stop working. And then he unwittingly falls in love with his sister whom he believed to be lost. He sets out to scientifically disprove the theory of heredity and marry his beloved as soon as possible. An absurdist firework of a silent film in black and white.。