Previously in Valentin & The Widow: The Mandrake Machine...

It is 1924. Eleanora Rosewood, the dowager Lady Rosewood, has uncovered her late husband's plan to destroy the city of Shanghai with a machine of his design - the Mandrake Earthquake Machine. Her investigations have brought her to the city and placed her in danger, but a Russian sailor named Sacha Valentin has come to her aid. Their only lead is a dangerous place named the Mandrake Palace. Our story continues.