"Every day without fail, Travis Devine puts on a cheap suit, grabs his faux-leather briefcase, and boards the 6:20 commuter train to Manhattan, where he works as an entry-level analyst at the city's most prestigious investment firm. In the mornings, he gazes out the train window at the lavish homes of the uberwealthy, dreaming about joining their ranks. In the evenings, he listens to the fiscal news on his phone, already preparing for the next grueling...

In this dazzling historical mystery, John Stone, financier and arms dealer, dies falling out of a window at his London home. The quest to uncover the truth behind his death plays out against the backdrop of high-stakes international finance, Europe's first great age of espionage, and the start of the twentieth century's arms race.