To Sir with Love (2006)
Upon learning that their wheelchair-bound former teacher is on the verge of death, a group of former students decide to stage an impromptu class reunion at her country cottage, only to find their gathering taking a decidedly dark turn. Sixteen-years have passed since Ms. Park's students graduated, and now they have learned that the woman who formed the foundation of their education is about to perish. Upon arriving at the remote cottage the group is overwhelmed by emotion, but happiness soon turns to anger as the dangerous alcoholics, insecure bulimics, and self-absorbed plastic-surgery addicts begin to realize that it was Ms. Park's peculiar teaching style that set them all down a deeply dysfunctional path. As old grudges come flaming back to life and long-buried secrets gradually begin to surface, the once-happy gathering turns into a nightmare rampage of death driven by deep-rooted childhood rage.