Diabolique - 1996

The wife and mistress of a school master that is barbarous collaborate at a attempt to murder him. Before body, that has been dumped, disappears the plan extends well. The strain starts to educate on the two women as a retired police detective who is looking into the disappearance on the whim begins to believe they know more than they have been telling, and their own emotional condition is not helped when their victim is seen, apparently alive and by one of many students.