Young public prosecutor Keiichiro Okino is assigned to the department of the Tokyo Public Prosecutors Office that deals with violent cases, where he will work with Takeshi Mogami, whom he admires. When a money lender is killed and it is suspected that someone from Mogami’s past is the perpetrator, the team prepares to do his best in order to prove the alleged criminal’s guilt.

川原恭一郎（舘ひろし饰）是位年近中年的公司职员，处事奉行中庸原则，属于可有可无的角色。在家里，宝贝女儿小梅（新垣结衣饰）对他的态度也是不冷不热的，恭一郎很是苦恼，却不知道如何改善两人的关系。

一次，两人乘坐的电车突然遇上了事故，两人在医院醒来后，竟然发现彼此交换了身体！

由于怎么也找不到变回去的方法，无奈的两人只好代替对方扮演起学生/职员的角色，其间麻烦无数，尴尬不断，爸爸更是与小梅暗恋的学长（加藤成亮饰）“斗智斗勇”，小梅则一改爸爸往日形象，在公司里大展身手，反倒令众人对爸爸另眼相看……最后父女俩能变回去吗？他们的关系又将变成怎样？

Rune Ballot is a down-and-out teen prostitute in Mardock City. One day, she's picked up by an ambitious casino manager named Shell who gives her everything she could want. Renewed by a false innocence, a false past, and now the false life Shell has given her, Ballot feels grateful. However, she can't help but be curious about why he's done so much for her, so she does some research about his past on a computer. This turns out to be a mistake which will change her life greatly. When Shell finds out what she's done, he attempts to burn her to death by blowing up her car.

承受着残酷命运的少女露恩•芭洛特（林原惠美 配音）与强敌鲍伊德（矶部勉 配音）进行着实力悬殊的惨烈战斗，危急时刻，号称万能兵器的犯罪搜查官乌夫库克博士（八岛智人 配音）出现，拯救了濒临死亡的芭洛特。当芭洛特再次醒来，发现自己正置身于传说中的禁忌科学诞生之地——“乐园”实验室，再次她见识了许多奇怪的发明，并了解到“乐园”和三博士的过去。经过一番追查，她终于得知榭尔（中井和哉 配音）的记忆正藏在卡西诺赌场的一枚筹码之中。为了追查榭尔的过去，芭洛特化装成赌客走入凶险的赌场……
本片根据冲方丁的科幻小说改编，为“壳中少女”三部曲中第二部（另两部分别为“压缩”和“排气”）。