In the war-torn city of 1944, a shadowy operative known as the Northern Reaper enters an exclusive Ashton auction house. His sole mission is securing a rare medicinal plant to save his poisoned brother Lincoln from impending organ failure. But an ancient bidding rule dictates that igniting the ceremonial sky lantern binds him into an instant betrothal with Serena Carmichael, the proud eldest daughter of an elite military household.
Drawn into high-society intrigue, the Reaper discovers that Serena's social circle conceals foreign spies and corrupt oligarchs developing deadly biochemical pathogens. While Serena investigates stolen cultural relics, the Reaper utilizes his lethal combat mastery to neutralize enemy agents in shadowed alleyways. Together, they must dismantle a hidden underground laboratory and expose high-ranking traitors before enemy forces unleash chemical contagion upon the entire besieged metropolis.
