Morse finds himself at the top of the suspect list when his lady friend, Beryl Newsome, is stabbed at a dress rehearsal for the local amateur dramatic society's production of The Magic Flute. Then Lewis starts uncovering more incriminating evidence, and Morse becomes the target of direct attacks. Who is it that wants to get at Morse so badly?

A new drug developed to combat senility is ironically being distributed to teens at all-night parties and driving some to suicide.