Jiang Huai met Yan Huai on Wutong Road in the midsummer after the high school entrance examination that year. Later, the two found out that they were neighbors or classmates. They quickly got to know each other and fell in love. After graduation, they became undercover agents for 10 years in the anti-narcotics police force. For 7 years, they did not know whether they were alive or dead. The last time they met again by accident.
