腿有残障的科学家桥本良晴（江口洋介）率领科学小组（大S、陈柏霖等）发明“孟结海绵”，捕获囚禁了一个十三岁男孩的鬼魂，为了查出该男孩的死因，以便自己死后也能变成类似的鬼，桥本良晴找来有超常能力的探员叶起东（张震），令其跟踪被放出去的男孩。最终，叶起东发现男孩是被他的亲生母亲杀害。其后，叶起东从男孩的双眼间看到一条细丝，它似乎连接着某种神秘的力量。科学小组成员因为害怕男孩伤害他们，再次将他隔绝拘禁，不想因此扰动了细丝的另一端，更为恐怖凶残的力量被释放出，小组人员先后一一离奇死亡，叶起东与女友（林嘉欣）也受到该力量的追踪。

主人公志行（谭耀文 饰）是一位地产经纪，他过着平凡的生活，对所有的事情都漫不经心。然而，在某一天，他重逢了小学时的体育老师老黄。老黄为了践行他和已故妻子的10公里跑步约定，即使身体不好也坚持练习准备参赛。与此同时，老黄的学生天心也为了和她的偶像一起跑步，毅然决然地减肥并全力以赴，她下定决心完成人生中的第一次5公里街跑。志行看到老黄和天心为各自的目标奋发努力，而自己却身处人生的十字路口迷失不知所措，感到自己的人生没有动力。一天，20年前的回忆突然来到志行的面前，给他的内心带来了一缕光明，照亮了他那被阴霾笼罩的心灵。这一次，志行下定决心要给自己的人生注入活力，重新振作起来。

女指挥家齐思甜（梁咏琪 饰）首次回国演出，她想趁着这次机会找回失散多年的兄弟姐妹们。20年前，齐家父亲（崔健 饰）是一个音乐老师，家中虽然清贫但也算是幸福。母亲（张健新 饰）长年来积劳成疾，突然病重。父亲在大暴雪的夜里送母亲到医院，却遇上了车祸。忆苦、思甜、天、妙四个孩子也成为了孤儿。表叔好心要求收留他们，但表叔家里也不富裕，更受到了表婶的强烈反对，大哥忆苦只好忍痛把弟弟妹妹都送给他人收养。4兄弟姐妹自此失散，但每人手里都拿着一张全家福。20年后的各人都有了各自的生活，或苦或甜，思甜苦苦追查也只找到了弟弟妹妹，忆苦碍于自己的寒微而不敢与思甜相认。演出如期到来，忆苦缺席了……

Wealthy Rollo Treadway (Buster Keaton) suddenly decides to propose to his neighbor across the street, Betsy O'Brien (Kathryn McGuire), and sends his servant to book passage for a honeymoon sea cruise to Honolulu. When Betsy rejects his sudden offer however, he decides to go on the trip anyway, boarding without delay that night. Because the pier number is partially covered, he ends up on the wrong ship, the Navigator, which Betsy's rich father (Frederick Vroom) has just sold to a small country at war.Agents for the other small nation in the conflict decide to set the ship adrift that same night. When Betsy's father checks up on the ship, he is captured and tied up by the saboteurs. Betsy hears his cry for help and boards the ship to look for him, just before it is cut loose.The Navigator drifts out into the Pacific Ocean. The two unwitting passengers eventually find each other. At first, they have great difficulty looking after themselves, but adapt after a few weeks. At one point, they sight a navy ship and hoist a brightly-colored flag, not realizing it signals that the ship is under quarantine. As a result, the other vessel turns away.Finally, the ship grounds itself near an inhabited tropical island and springs a leak. While Rollo dons a deep sea diving suit and submerges to patch the hole, the black natives canoe out and take Betsy captive. When Rollo emerges from the ocean, the natives are scared off, enabling him to rescue Betsy and take her back to the ship. The natives return and try to board the ship. After a fierce struggle, Rollo and Betsy try to escape in a small dinghy. It starts to sink, and the natives swiftly overtake them in their canoes. Just when all seems lost, a navy submarine surfaces right underneath them and they are saved.