母親節，努力補救夫妻感情的陳莫（張震 飾）和妻子（桂綸鎂 飾）相約共進晚餐，想拉近他們疏遠的感情。他在回家途中想買個蛋糕，正好路邊有個停車位，陳莫開心地停車，離開去買蛋糕，不料回來之後，車子卻意外被一架違規平行停泊的車堵死、動彈不得。為了尋找車主，他接連踫上獨臂理髮廳老闆（高捷　飾）、失去獨子的老夫婦和小孫女、被黑社會追債的香港裁縫（杜汶澤　飾）、火爆的馬伕（戴立忍　飾）、想逃脫馬伕魔掌的大陸妓女（曾佩瑜飾）。整個晚上遇上了一連串的奇人異事，還被打得鼻青臉腫。搞了一晚，陳莫到底能否安然回家？
是的，停車位很難找，一旦找到了，可別高興得太早……。

Chen Mo makes a date for dinner with his wife. While buying a cake on his way home, a car unexpectedly double parks next to his car, preventing his exit. For the entire night, Chen Mo searches owner of the illegally parked car, and encounters a succession of strange events and eccentric characters.