In a time when the Iron Gate stood as the bulwark of the city, a guardian's valorous last stand became the stuff of legend, forever etched in the annals of time....

When a young archaeologist stumbles upon an ancient map, she embarks on a perilous journey through the Iron Gate of Handan, seeking the fabled Hidden City, only to find herself entangled in a labyrinth of echoes that reveal the city's dark past and her ow...