In 1937, Shanghai was filled with smoke and the mountains and rivers were broken. River Dong, an employee of a foreign company, and his wife Vivi wanted to survive in troubled times, but after witnessing the atrocities of the Japanese army, they resolutely joined the anti-Japanese torrent. They used their bodies as chess pieces to deliver information and protect their comrades, and eventually both died in the darkness before dawn.
Sixty years later, they were reborn in the same era. He became a taciturn historian, and she became a gentle and tough museum researcher. The vague shadows of their previous lives remained in their hearts - the unfinished vows and the unquenched flame of love, but in this life, she was already a wife.
The gears of fate are turning again, and the unfinished mission and love in the previous life are intertwined again in this life. Can they break through the fog of memory and hold each other's hands before parting again?
