其貌不扬的中学生藤井俊介（小柴亮太 饰），在青春烂漫时节结束了自己的生命。生前他曾遭到同班同学的欺凌，不堪忍受的少年留下了“我成为了大家的祭品”这样的遗言在自家院子里上吊身亡。俊介之死在社会上引起轩然大波，尤其是他的遗书毫不避讳地点出了欺凌者的姓名，让欺凌这个敏感话题在学校内外闹得沸沸扬扬。此外，遗书中另外提到了两个人的名字。一个是俊介小学时代的好友，但如今关系平平的真田裕（小出惠介 饰），另一个是俊介生前一直爱慕的女孩中川小百合（木村文乃 饰）。死者对两个人的感谢和抱歉，让活着的人背负重到喘不过气来的十字架……

Shunsuke Fujii was a bullied middle school student. He took his own life. A letter left behind referred to his classmate Yu Sanada as a friend. Sayuri Nakagawa was a girl that Shunsuke liked. Her birthday is the same day as the day Shunsuke commited suicide. Shunsuke's father can not forgive Shunsuke’s classmates and his mother's life has been destroyed by his death. They have spent 20 years of their life carrying their own cross since Shunsuke Fujii's death.