Shen Lin, who had just turned 20, was forced into a fake marriage with a wealthy businessman due to an agreement.
But she never dreamed that after opening the door, the livid "cheap step-son" standing in the living room was actually her desk next door in high school - the most difficult-to-discipline unruly guy in the school, Lu Yun.
The former aloof squad leader has now become an elder that he can avoid. In order to maintain this crumbling respectability, the two people built a high, cold wall under the same roof, and no one was willing to cross the boundary.
He has a bad temper, is full of barbs, and is extremely resistant to this outrageous family relationship. But for such a boy who is so obsessed with face, in order not to spend the money that he "exchanged for her" in name, he would rather go to the stinking and sweaty evening rush hour subway every day, relying on the cheap internship salary of 100 yuan a day, just to collect money to buy a 600 yuan box of scar removal medicine for her.
Shen Lin thought that as long as they got through this absurd masked marriage, the two would be completely separated like two parallel lines.
Until that thunderstorm summer night, the power went out in the living room...