该剧讲述北海道北友学园余市高校専门收容来自全国各地被学校退学的高中生，这些学生素行不良、不爱读书、喜欢恶作剧，甚至于在学校集体欺负同学等，这些所谓的问题学生，都来到这里上。

重新出发的吉森真也（竹野内丰饰）曾经是一名不折不扣的不良少年，从北友学园余市高校毕业，后来他变成了一名老师，回到母校来教育一群不知天高地厚的学弟、学妹们，这位充满热情、满怀壮志，决心要将他们洗心革命。然而，这些血气方刚的不良少年可没那么容易受到感化。 [2]

Based on a true story from Hokkaido’s Hokusei Yoichi High School, the first high school in Japan to accept high school dropouts nationwide and the subject of a successful documentary, this drama will follow a former gang member, dropout and graduate of the school who returns as a teacher. We will follow him as he helps graduating students out into the world. The teachers and students will, as you would expect, confront all the issues of youth and society today. At this school, there are no compromises, no lies. This drama will move you as both students and teachers face a variety of issues head on. This is a moving story that is created by people coming together and learning to believe in each other.

Un ancien membre de gang, qui a abandonné ses études et est diplômé du lycée Hokusei Yoichi, y revient en tant qu'enseignant. Dans cette école, il n'y a pas de compromis, pas de mensonges.