How can you solve a murder before it's happened? 'This is my challenge for you,' the woman in white said. 'I want you to solve my murder.' London, 1930s: Rachel Savernake has been invited to a private view of an art exhibition at a fashionable gallery. The artist, Damaris Gethin, known as 'the Queen of Surrealism', is debuting a show featuring live models pretending to be waxworks of famous killers. Before her welcoming speech, Damaris asks a haunting favour of the amateur sleuth: she wants Rachel to solve her murder. As Damaris takes to a stage set with a guillotine, the lights go out. There is a cry and the blade falls. Damaris has executed herself. While Rachel questions why Damaris would take her own life - and just what she meant by 'solve my murder' - fellow party guest Jacob Flint is chasing a lead on a glamorous socialite with a sordid background. As their paths merge, this case of false identities, blackmail, and fedora-adorned doppelgängers, will descend upon a grand home on Sepulchre Street, where nothing - and no one - is quite what it seems.