The struggling old bookstore, Shiguang, becomes the starting point for uncovering a century-old family secret.
When Li Wan, the third-generation owner, discovers her grandmother Lin Yuehua's incomplete diary from 1947, the sealed past bursts open: underground intelligence operations in turbulent Shanghai, the truth behind her mother Li Jing's husband's mysterious disappearance in 1992, and the enigmatic "gear" symbol linking them all are unexpectedly intertwined with her modern-day bond with Cheng Chen, an architect.
The unusual color-vision deficiency Li Wan inherited is actually the key to opening folds in time, allowing her to glimpse the past concealed by a bloody conspiracy. Facing the "Silver Birds," an organization manipulating the hidden currents of history, and its apocalyptic plan known as "Lighthouse," Li Wan must piece together the truth through fractured timelines. Guided by her bloodline, she struggles to travel between the flames of 1947, the haze of 1992, and the present-day crisis, protecting her loved ones and preventing time and space from collapsing. A journey of redemption spanning three generations of women quietly begins in the folds of time.
