体育课上，大家欢声笑语，快乐运动。你的小B不就是用来C的吗

　　The film's plot revolves around the parents of three pupils who are summoned by the headmistress of a provincial middle school: something bad has happened, for which their children are responsible. But it is hard to believe and to accept. The gym turns into an improvised courtroom, where a fierce trial begins in a stubborn attempt to deny and hide the truth.