Meet Mrs Melita Pargeter, a vivacious widow with a talent for solving mysteries.

Melita moves to a lovely new home in leafy Surrey, where her neighbours are well-to-do young couples.

But then her boiler breaks down, and she tries to get in touch with the former owners, Mr and Mrs Cotton. It turns out they have vanished without trace.

Melita is curious.

She finds out that Theresa Cotton was young, happily married (or so it seemed), and very nice in every way.

Then she discovers a letter with some shocking revelations. Nice Mrs Cotton was mixed up with some very shady characters.

Melita’s determined to piece together the mystery, but her snooping hasn’t gone unnoticed.

Does the killer now have another Mrs in his sights?