In a high-stakes transatlantic flight from London to New York, a murder mid-air sets the stage for an unraveling conspiracy far beyond what Detective Auguste Dubois had anticipated. A locked lavatory, a cryptic playing card, and a cast of passengers tangled in deception force Dubois into a battle against time and unseen adversaries. But when Flight 412 makes an emergency landing on a remote island, the mystery deepens, turning the investigation into a desperate survival game. Loyalties fracture, identities shift, and a sinister network lurking in the shadows is revealed. Can Dubois untangle the web of deceit before it's too late? Or will he become yet another pawn in a masterful game of betrayal?