In order to support his mother in college, "money-grubbing teacher" Xia Lin accepted the sky-high offer from Anchen City's industrial school, but stepped into the beginning of the collapse: an "experimental class" with only three students, each with a shocking past - a stolen genius, a drug-addicted girl, and a drug abuser. She is a pawn in the game between the principal and the vice-principal, and she is the enemy in the eyes of the students. Xia Lin chose to use unconventional means to solve the difficulties one by one.
From the cigarette provocation in the back alley of the toilet, to the life and death struggle of falling from the rooftop; from the hot-blooded teenagers causing trouble in the cafeteria, to the dazzling counterattack of the Olympiad champion. When five scarred souls recognized her as their "mother", and when the mud of the past began to emerge toward the light, Xia Lin realized that redeeming these "problem youths" was actually the way for her to pay back her dark past and rebuild her self-worth. Deep in the mud, one can also be born toward the light.