The middle aged matron at a Norwich school wins a large prize in a French lottery. She is murdered in London and the murderer's secretary impersonates her and draws the old lady's prize money. There follows a series of killings until the murderer realises that he is trapped and commits suicide. The middle aged matron at a Norwich school wins a large prize in a French lottery. She is murdered in London and the murderer's secretary impersonates her and draws the old lady's prize money. There follows a series of killings until the murderer realises that he is trapped and commits suicide. The middle aged matron at a Norwich school wins a large prize in a French lottery. She is murdered in London and the murderer's secretary impersonates her and draws the old lady's prize money. There follows a series of killings until the murderer realises that he is trapped and commits suicide. The middle aged matron at a Norwich school wins a large prize in a French lottery. She is murdered in London and the murderer's secretary impersonates her and draws the old lady's prize money. There follows a series of killings until the murderer realises that he is trapped and commits suicide.