Each episode pulls you into someone else's photograph and leaves you there long enough to break your heart. The mysteries aren't puzzles to solve from the outside, they're lives to understand from inside, and understanding always costs something. By the final episode, you realize the show wasn't about time travel at all; it was about what you'd sacrifice to save someone, even when saving them breaks the person trying to do it.

Two men run a small photo studio in a busy modern city, one whose entrance looks abandoned. Cheng Xiaoshi and Lu Guang have a rare ability: they can step inside photographs and live through the moments around them, seeing events through the eyes of whoever took the picture. Clients come to them with requests, and the pair enter their photos to fulfil them. Every jump carries real risk, since a single mistake could change the photographer's future and ripple into other events. When the cases start to turn personal, the two must set their feelings aside and finish the job they were paid for. The series is a supernatural mystery thriller with a strong dramatic streak.