In Shanghai in 1927, Shen Qingyuan, the daughter of the Shen family, found a brass pocket watch in the attic. The words "A Yuan Qingqi" engraved on the inside of the watch cover suddenly revealed the thoughts she had hidden for three years.
That year, she went to a banquet with her father and accidentally discovered that the warlord's son Lu Chengze was having a secret conversation with the underground party. In the panic, he picked up the pearl earrings left behind. After that, the chance encounter in Qingshi Lane, the secret help in the bookstore, and the oil-paper umbrella handed to them on a rainy night made love quietly grow, but the turmoil of their family and country stood between them.
When the Japanese army approached, Lu Chengze suddenly disappeared, leaving only the stopped pocket watch. When Shen Qingyuan thought that her youth had become an old dream, in the concession hospital, she actually saw the familiar pocket watch with her name engraved on it on the stretcher of the wounded soldier...
