In 2015, on the night of architect Liu Chao's proposal at Genting Observatory, the blue light disappeared due to a magnetic storm. The world of Su Qingxue, the fiancée and trauma surgeon, has come to a standstill. In the past five years, she was diagnosed with traumatic delusion by her best friend Chen Mo. Only the studio left by Liu Chao hides the secret.
On a rainy night in 2020, Liu Chao suddenly appeared at the emergency center. His bloody fingerprint left the letter "L" and then disappeared. Su Qingxue no longer waited, and followed the password "LATE≠LOST" in the star map notes. Under the guidance of the archives administrator Lin Wan, she came across the tip of the iceberg of the "space-time folding" experiment - Liu Chao became a quantum experimental subject, which could only be briefly materialized every five years.
With the exposure of the experimental confidentiality agreement signed by his father, the truth about Chen Mo's tampering with data emerged (his sister died in an early experiment). Su Qingxue discovered that her body could actually become a quantum resonance carrier. In the final rescue, Liu Chao must forget his beloved in order to survive.
In the observatory reconstructed in 2025, the two people looked at each other strangely in the morning light, but resonance spots appeared on their palms at the same time. The letters buried in those years have become a source of energy. The unfinished "Bridge of Time" is being rebuilt by citizens, and their love is resurrected outside of memory.
