An excitable and clumsy Reverend Weaver is leading a church service at the Tower of London. It's meant to be a special honour, but when one of the ladies in the congregation drops dead from poison, the Reverend finds himself under arrest as the number one suspect. After all, the murdered lady in question was trying to have him fired. When Palace Housekeeper, Mrs Bramble, hears about the Reverend's conundrum, she journeys from the safety of Hampton Court Palace to investigate. How could she not, when the Reverend is a dear friend, and she has a knack for solving the murders of distinguished ladies? Arriving at the Tower, Mrs Bramble finds evidence of bitter feuds between families and secret trysts that lengthen the list of suspects. Will she be able to find the killer before they strike again and free her friend? Or will the holy man have to pay for this unholy crime?