In the spring of 1975, the talented female scientist Su Wanqing was conducting top-secret scientific research, but was targeted by the overseas organization "Nightingale".
The country urgently launched the "Marriage Protection Plan": Agent Lu Huaijin was ordered to have a flash marriage with her and become her "husband."
During the day, they were ordinary loving couples in the Tongzi Tower; at night, they each guarded the country's secrets and each other's lives.
When the fake show comes true, when dangers abound, this marriage that started on a mission has become their truest weakness and armor——
"Lu Huaijin, we will divorce when the mission is over."
"Sorry, my new mission is to love you forever."
