A mysterious invite, a festive party, and a murderer hiding amongst the mistletoe. Christmas in England, 1936. When Ruby Dove receives a cryptic invitation to Lady Charlesworth's swanky London soiree, Fina Aubrey-Havelock convinces her friend to attend. With journalist Pixley Hayford in tow, the trio is determined to have a smashing time and discover the face behind the missive. But they soon face...