故事发生在某大型海洋世界，国产卖鱼大叔牙叔（葛优 饰）、国产海豚训练员阿乐（岳云鹏 饰）和海洋馆保安杜治国（杜淳 饰）因工作结识，因境遇相怜。他们奋力挣扎，却最终遭受情感的挫折。这一晚，三人相约聚餐，借酒浇愁，在晕头转向、不省人事的时候，一辆汽车来到海洋馆。醉眼迷蒙的牙叔稀里糊涂在货单上签了字，第二天醒来却发现海洋馆的明星海豚宝宝被他卖到了国外。这桩意外顿时把三人的酒都吓醒了，而他们也成为盗售海豚的重要嫌疑人。在此之后，他们匆匆忙忙踏上寻找海豚的征程，一路上更是闹出了无数的笑话……
回复 :大正时代，出身贵族的松枝侯爵家嗣子松枝清显（妻夫木聪饰演），对青梅竹马的绫仓伯爵家的掌上明珠聪子（竹内结子饰演）情有独钟，但清显一直没有勇气向她表白，反而笨拙地示爱或者伤害，甚至因为误会中断联系。然而由于贵族彼此间的复杂考虑，聪子和治典殿下订了家族婚事，清显这才发现他对聪子的爱无法自拔，通过多方设法，使两人得以私下偷会，但恰恰这样的行为反让这对情侣都陷入绝望的苦恋而无法自拔，已是他人未婚妻的聪子怀孕后，真相无法掩藏，他们走向了爱情的尽头。
回复 :江城富豪沈洞天为选择性失忆所困扰，在心理医生方依云的建议下，他决定接受深度催眠的疗法来探寻往事的真相。随着治疗的深入，尘封已久的往事逐渐浮出水面。沈洞天发现，自己的失忆和前妻杜阑珊的死有着密切关系，他很可能就是杀害杜阑珊的凶手！沈洞天的未婚妻莉莉和弟弟千鹤不断阻止沈洞天的治疗，这似乎更加印证了沈对自己的判断，然而，一次偶然的机会，沈洞天发现自己的心理医生方依云竟然已经"死去多年"，这个神秘的催眠师让事情再度变得扑朔迷离，而弟弟也似乎向他瞒着一个巨大的秘密。那么，事情的真相究竟是什么？谁是杀害杜阑珊的真正凶手？"方依云"究竟何许人也？
回复 :Haunted by the memory of Walter Holderlin, a soldier he killed during World War I, French musician Paul Renard (Phillips Holmes) confesses to a priest (Frank Sheridan), who grants him absolution. Using the address on a letter he found on the dead man's body, Paul then travels to Germany to find his family.As anti-French sentiment continues to permeate Germany, Dr. Holderlin (Lionel Barrymore) initially refuses to welcome Paul into his home, but changes his mind when his son's fiancée Elsa identifies him as the man who has been leaving flowers on Walter's grave. Rather than reveal the real connection between them, Paul tells the Holderlin family he was a friend of their son, who attended the same musical conservatory he did.Although the hostile townspeople and local gossips disapprove, the Holderlins befriend Paul, who finds himself falling in love with Elsa (Nancy Carroll). When she shows Paul her former fiancé's bedroom, he becomes distraught and tells her the truth. She convinces him not to confess to Walter's parents, who have embraced him as their second son, and Paul agrees to forego easing his conscience and stays with his adopted family. Dr. Holderlin presents Walter's violin to Paul, who plays it while Elsa accompanies him on the piano.The film's original title, The Man I Killed, was changed to The Fifth Commandment to avoid giving "wrong impressions in the minds of the public about the character of the story." It ultimately was released as Broken Lullaby.
