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When a school crashes down around the children inside for no apparent reason, architect Phillip Braun (Helmut Griem) is quickly apprehended and tried for having condoned inferior design and construction of the building. He is sentenced to prison. After he has already served his sentence, his lawyer (who in the meantime has become the lover of Phillip's wife) discovers that the real blame for the incident may lie elsewhere. However, overwhelmed by his passions, Phillip is easy prey for the villain. This psychological crime thriller was based on The Glass Cell by Patricia Highsmith.