Lu Heng is a rail transit signal debugger. There are no accidents in his world, only presets and feedback.
Shen Qingye is a city planner. Her drawings are full of ideals, but she cannot draw a road to stability.
The two were forced to get married due to a family deal, and the prenuptial agreement was written colder than technical specifications.
On the first night living under the same roof, he planned the washing time precisely, and she left her high heels in the hallway.
He thought it was a marriage that could run on logic, but she thought it was just a temporary rooming house for a year.
Until she made the wrong call when she had a fever, and he gave up debugging the entire line and ran out of the tunnel;
That was until he turned down his dream "Hyperloop" project for her, and she discovered late at night that his phone was filled with recordings of her drunken nonsense.
At the fork in career and love, he faces a choice: keep her "heart of the city" or run to a distant place?
She asked him: "Are you choosing the road or me?"
He replied: "I choose the same path as you."
When the train is about to open, when the anonymous reporting letter ignites public opinion, and when the secret that made my mother leave ten years ago comes to light -
Only then did he realize that the signal that most needed adjustment in life was never the traffic light, but her heartbeat.
