Taira is a disaffected youth from a seaside town reveling in violence. Enamored by his strength, Yuya joins his crusade in attacking strangers. Meanwhile, Taira's brother looks for him.

Kasumi doesn't know what love is and she doesn't have any feeling of romance. Due to her sister's marriage, her mother arranged a formal marriage arrangement without her permission. At the meeting, she met a man who is just seeking friend.

经营咖啡店的桧山贵志（小出惠介 饰），他的妻子被三名13岁少年残忍杀害。然而根据青少年保护法，凶手作为未成年人而得到额外保护。身为受害者的贵志及家人既不知道凶手的真实身份，也不知道少年们作案的动机。他的生活被彻底摧毁，人生的方向也发生根本转变。如是过了四年，少年们经过改造重新走上社会。而贵志不顾身边人的劝说，执意要调查少年们改造后的情况。在此过程中，名叫和也的行凶少年之一被人杀害，缺乏不在场证明且拥有作案动机的贵志一瞬间成为了最大嫌疑犯。以血洗血的复仇，以悲剧的形式迅速展开……
本片根据药丸岳荣获第51回江户川乱步赏的同名推理小说改编。

Katsu (Mitsuko Baisho) is a 73-years-old woman. She often makes trouble with her biting remarks. While raising a daughter alone, Katsu was unable to live the life she wished for. One day, Katsu goes to a photo studio and takes a picture. She leaves the photo studio, but finds that she is now 20-years-old (Mikako Tabe) again. Katsu changes out of her grandmother clothes, picks out a more youthful style and names herself Setsuko Otori. Later, Katsu decides to take part in a singing contest held in a shopping district. Her singing fascinates the audience and she wins the contest. Katsu begins to move closer to her past dream of becoming a singer.

Japan has a conviction rate of 99.9% for criminal cases that go to trial. A lawyer (Hiroki Hasegawa) is able to defeat those odds and obtain an acquittal for his client, even though there's conclusive evidence that says otherwise. Sometimes, due to minor things, good and evil can switch sides and good people can become bad people.

本剧超越了“律政电视剧”的框架，通过长谷川博己饰演的反英雄，向观众传达“正义到底是什么?”“被认为是世上的恶，真的是坏事吗?”，以快速的展开，颠覆了一个又一个的常识，以及日常生活中微不足道的契机，比如“错过了一趟电车”“早上忘带东西回家拿”，而仅仅因为这一点，正义和邪恶就会交替 ，好人就会变成坏人，就像蝴蝶效应一样，传递了前所未闻的逆转悖论娱乐故事。

A shy high schooler in Kyoto meets a man claiming to be his future self, who tells him he’s hacked into the past to save their first love.