Lin Wan, who runs a niche photo studio in an old alley of "Fog City", has an unknown secret - in the photos she takes, there are occasionally scenes that do not belong in the lens: sometimes it is half of a woman's clothes in a Republican cheongsam, sometimes it is the bell of a bicycle in the 1980s. Until one day, a man named Lu Shiyan came to develop and print a yellowed old photo. The scene in the photo was exactly the same as the old building that appeared repeatedly in Lin's late dreams. What's even more bizarre is that every time Lu Shiyan comes to the store, the "abnormal picture" in Lin Wan's camera will become clearer, and the old pocket watch he carries with him always emits a faint light at critical moments. As the two got in-depth contact, they discovered that Lin Wan's photo studio was the entrance to the "time and space rift", and Lu Shiyan was the restorer who traveled across time and space to find "time and space fragments", and those fragments were Lin Wan's lost past life memories. While collecting fragments to repair time and space, the two of them fought against the "countercurrent organization" that wanted to use the fragments to tamper with history. In the process of traveling between the past and the present, they gradually recovered their love that spanned a century.
