As an archive restorer, Shen Tingyun accidentally discovered an unsent final letter while repairing a batch of old archives from the Republic of China. The signature was actually her fiancé Lu Xunzhou, who had been dead for three years. The date in the letter was the day before Lu Xunzhou "died in the line of duty", but the content pointed to a long-planned betrayal - he did not die to protect her, but chose to fly away to cover up a secret.
Shen Tingyun continued to pursue the case with a heartbeat of seeking verification, but when the truth was approaching, he received a real-time message from Lu Xunzhou: "Stop looking. I don't recognize a word of what happened back then."
It turned out that the real Lu Xunzhou had already died in the explosion. And the gentle and considerate "Lu Xunzhou" who was by her side at the moment was just his twin brother Lu Duabian who was trying to atone for his sins with this face.
One is a substitute living in a lie, and the other is a lonely soul trapped in memories.
This reunion, which began with a broken promise, was destined to end in aphasia.
Concept: Some love is an abyss, and what you think is salvation is actually falling deeper into hell.