When a historian delves into the enigmatic Beijing Enigma, he uncovers a haunting conspiracy involving a fourth unseen conspirator, leading to a betrayal that shatters his world....

When a once vibrant Shanghai district becomes a ghost town overnight, a young detective must unravel the secrets of the past to save the present, all while confronting a force beyond his understanding....

(In a hidden wing of the city's oldest library, secrets of the past and the unseen conspirator converge, leading a librarian on a harrowing quest to uncover a forgotten truth that intertwines with her destiny.)...