In the near future where memories can be repaired and edited, top memory restorer Lin Cheng can stitch together the broken pasts of others, but he is unable to piece together the complete truth behind his wife's accidental death. He was imprisoned by official records and a "perfect" sad memory, until an accidental memory "garbled" allowed him to glimpse a blue butterfly brooch that should not exist. This small crack, like a key, is about to open his dusty island of memory. In order to find the truth, he had to challenge his most superb skills and confront the person closest to him who tried to imprison him forever with white lies.
