Shinko Tsutsumi (Ryoko Shinohara) has just finished serving time for her con artist past. Hungry and with only a handful of coins to her name, she spots a welldressed gentleman as her new target. But, as fate would have it, the man was an official from the government's accounting office, the watchdog of proper use of tax money. The official decides Shinko's expertise in scams could be useful and hires her as an inspector. Thus begins the wild and funny adventures of Shinko's battles against abuse of public money.

From bogus police investigation funds to retirement homes fronting for lavish housing of former officials, Shinko displays a knack for sniffing out such sham projects. Childhood memories of squirreling away coins in a piggy bank to try to help her financially struggling mother make Shinko all the more loathe to forgive misuse of hard-earned tax money. While she fights imposters, Shinko must also confront lethargy within the office where the bureaucrats' zeal for justice has been deflated by the scale of long-standing, extensive corruption. Shinko gradually wins over the colorful cast of her co-workers, but meanwhile there turns out to be another enemy of integrity that is bigger than anyone expected.

2010年度的国家预算为92兆日元。这是国民用汗水辛勤劳动纳税的税金，是国民的小猪存钱罐—黄金猪。主人公芯子（筱原凉子饰）用破天荒的方法挑战不正当使用税金的恶人们，惩恶扬善！

一名假释中的前诈欺师芯子，被会计检查厅检查官久留米（宇津井健饰）吸纳为良材，专门调查不正当使用国民用血汗钱交的国民税金—黄金猪的恶人们，惩恶扬善。芯子的第一个任务是调查养老院的不正贪污。芯子用敏锐的嗅觉和看穿谎言的慧眼，瞄准了一家养老院，「…这里有欲望的味道」。芯子与东京大学毕业的新人优（冈田将生饰）、课长辅佐明珍（生濑胜久饰）、无头衔的角松（大泉洋饰）、但求平安无事的消极主义者金田（桐谷健太饰）们一起开始调查。虽然破天荒，但以独到的正义感劝善惩恶的芯子，原本态度暧昧的同事们也逐渐被卷进来。可是，当终于抓住恶势力的尾巴时，被上层叫停…！