1954年9月，一艘往来于青森和函馆的客轮在海上沉没，大批的乘客遇难。阿久津是青函隧道技术调查团的成员，正在津轻海峡进行调查，偶然地救了一个想自杀的女孩牧村多惠，并将他带到阿连经营的食品店工作。1956年，阿久津向上级汇报，认为青函隧道可以挖掘。第二年他被派往明石海峡调查，在故乡结婚生子。1964年，日本铁路公司成立，青函隧道开始动工，阿久津也来到青森。由于多惠的帮助，他招了一批立志为青函隧道献身的年轻人。施工后由于风大浪险的恶劣环境，两个月里工程只挖了五米。为完成父志，阿久津不顾风湿病折磨，始终战斗在施工现场。就在父亲病逝那天，隧道中发生冒顶事故，地下水汹涌而出。阿久津带着工人和技术人员奋力抢救，虽然不断有人负伤甚至牺牲但无人畏缩不前，终于制服了坑道渗水。日本最长的隧道完工了，阿久津在父亲的墓前献上了一束青森的草花。

Keiko, whom everyone calls Mama, narrates her story: she's a hostess on the Ginza, 30, a widow. She describes life's vicious cycle: acting cheerful around drunks, dressing and living well to convey confidence, needing money for these expenses and for her demanding mother and brother, and knowing she's growing older.

A car going at 25 mph plunges into the sea at Shinko Harbour, Toyama prefecture. Inside is the local business magnate Fukutaro Shirakawa, who perishes. Riding alongside him and surviving unhurt is his second wife, Kumako. It soon comes to light that Kumako’s husband was insured for 300 million yen and she is arrested on suspicion of murdering her husband for the insurance money. The newspapers denounce her as an evil woman, while the public is in no doubt about Kumako’s crime. Ritsuko Sahara is chosen as her defence attorney but the pair clash over almost everything...

Onimasa is the egocentric boss of a small yakuza clan on Shikoku Island, whose criminal duties conflict with his self-image as a chivalrous samurai. His struggles with his boss, the Shikoku Godfather, and the tumultuous life of his adopted daughter, Matsue, form the backdrop of this epic tale of justice, obedience, and bloody vengeance.

板仓亮子（宫本信子 饰）是港町税务署的调查员，她工作认真负责，但在收到一位老婆婆的指责后，她不再将目光停留在普通老百姓身上，而是转移到大的商会上面。在她锲而不舍的追查下，许多狡猾的公司老板纷纷现出原形。不过亮子也有为难的时候，经营旅馆业的权藤英树（山崎努 饰）就是一条狡猾的老狐狸，任凭亮子怎样调查也找不到蛛丝马迹。
不久后，亮子因工作出色被调到国税局侦查科，她和同事齐心协力侦破不少偷税案件。随着一同匿名举报电话的到来，权藤的案子再次提出，亮子决心将其偷税事实彻底查清……