Chicoutimi, 1990s. Catherine's parents hate each other and argue from morning to night. On her 16th birthday, their acrimony sparks an argument with irreversible impact. A separation seems inevitable and her mother, in search of a new home, lets her daughter in on her plans. In high school, the shy teenager attracts the attention of a popular thug and, at the same time, the fury of the latter's sassy girlfriend. To fit in, Catherine begins hanging out with delinquents.