为了实现梦想，四个青少年决定通过在线销售SAT考试成绩来赚钱。索菲想筹集资金支付她在瑞士的大学学费，亚历克斯想建立自己的录音室，阿玛莉亚想给她当参议员的父亲留下深刻印象，而富田则想来一场冒险。一切都很顺利，直到他们都被迫面对周围的现实以及自己行为的后果。
陈大文（梁朝伟 饰）有一名拍拖十年之久的女友（刘锦玲 饰），两人将近结婚。他与好友程仁（梁家辉 饰）、毛周朱（郑丹瑞 饰）住在一起。每个晚上程仁都会带不同女生回家，毛周朱则胆小如鼠，不敢与女性交往。
Based on the internationally best-selling novel by Jonas Jonasson, the unlikely story of a 100-year-old man who decides it's not too late to start over. For most people it would be the adventure of a lifetime, but Allan Karlsson's unexpected journey is not his first. For a century he's made the world uncertain, and now he is on the loose again.
