某夜，在江邊北道發生一起四車連環車禍，車禍導致一名神秘女性死亡。四輛車的肇事者匯聚一堂，爭執不休。眾人索性一起來到警察局報案，喧嚷不堪，造成不小的混亂。這時，警察在死者的隨身物品中發現一個U盤，這似乎暗示著什麼。於是，眾人將重心轉移到這個可疑的U盤上，他們發現U盤裡面竟然存儲著目前人氣競猜節目中最後一題的最終答案。要知道，這檔競猜秀自開播起有無數精英參加，但都在決賽時無法回答這出人意表的最後一題，至今終獎金已累積至133億元。於是，這幫腦袋不太靈光的傢伙為了獲得豐厚獎金，決定出戰這場意想不到的競猜秀。但也只有成功回答29道題的參賽者能夠進入決賽挑戰最後一道題，到底最後獎金會鹿死誰手呢？

Two gangs, four depressed people, husband and wife, father and son, each couple hits a woman at the same time while driving on a high way and everybody goes to the police station to write statements. However, when the police search the dead victim, an USB is found which contains a strange riddle. Everybody who used to blame each other now gives great cooperation and does their best to solve the riddle until they find out it is the answer for the last question of the famous quiz show.

This notorious monthly quiz show never had a winner since its first broadcasting and every single genius failed at the unexpected last question. Now the saved award reached 10 million dollars and the competition gets tougher and tougher. On the day of quiz show, they gather all together like they promised. But only one couple who passes 29 questions can reach the final stage. Who will take the chance to be a billionaire?