Chan-woo, who has been studying to become a police officer for 5 years, joins his friends for dinner to ask for the money to apply for his exam and ends up getting drunk. He completely blacks out and wakes up not remembering what happened in his next door neighbor's room. Not only that, he finds a bloody corpse in the middle of the room. He hurries back to his room and tries to report the incident but he had forgotten his phone in the other room. But the door is locked and he has to resort to using a rope to swing to the next door room outside the window. Once the phone is recovered, he cannot go back because of a group of cultists who are evangelizing the neighbors in the hallway. He knows it’s the last day to apply for his exam and gets antsy as time is running out.

解放战争未期，北大荒某地。已转业的老战（崔嵬 饰）响应国家号召，来到黑龙江开荒建农场，和他一起来的还有过去的通信员小冬子（孙永平 饰）和周清和（顾也鲁 饰）。小冬子热情活泼，周清和则对荒无人烟的北大荒心存畏惧。老战在一个废弃的碉堡中建立筹备处，他对北大荒的未来充满信心。不断涌来的垦荒大军和农业机械让老战满心欢喜，在和副场长赵松筠（韩涛 饰）进行一番争论后，坚持播下一万亩冬小麦，以期来年夏收。一天，残存的国民党匪兵偷袭了附近村庄，老战闻讯，组织农场人员前去剿匪，帮百姓夺回了被抢走的粮食，百姓们深受感动。当夏收时，收割机不够用，当地百姓自发帮农场割麦子，“虎口”夺粮的壮举深深感动了农场职工，而老战也面临接受新的任务......

正直善良的藤野兆治（高仓健 饰）因与上司发生分歧离开了工作多年的函谷船坞，在此之后他和妻子茂子（加藤登纪子 饰）自食其力，开了一家小酒馆。当初工厂里的朋友岩下（田中邦卫 饰）、秋本（小松正夫 饰）等人经常来此喝酒聊天，小酒馆内充满欢快温馨的气息。兆治早年的恋人小夜（大原丽子 饰）如今是神谷牧场的女主人。曾经贫困潦倒的生活迫使两个相爱之人分开。时间并未冲淡留在彼此心中的情感，兆治和小夜始终依恋着对方，只因各自的家庭他们只有将这份感情深深埋藏。一场大火烧毁神谷牧场，为婚姻所苦的小夜终于解脱，远走札幌。即便如此，对恋人强烈的思念仍促使她打去一通通无言的电话……根据山口瞳同名小说改编。

作为一部反映现代农村生活的影片，《同喜》讲述了村里老好人贾有权以经营果园和饭店为生，却由于村里随礼风俗，导致入不敷出。从而引发了有关家庭、金钱等一系列啼笑皆非的故事，是一部具有移风易俗题材的农村喜剧电影。