Led by an excellent performance from Takako Matsu, the story follows a school teacher who is convinced that her daughter was murdered, and is driven to ensure that the guilty are brought to justice.
The build-up towards the stunning conclusion is chilling, precisely slow but never boring. The film is rather structured as a set of character studies, and paints an extreme image of what human beings are capable of under copious amounts of pressure, regardless of their age. There are striking images in the film to convey emotion where words are unspoken, and while the teacher is resolute in her mission, there seems to be an undercurrent of her longing to return to innocence.
In a summary, this is one frightening and intense film, not to be missed.