In 2023, Lin Qingxue is left in a vegetative state after a car accident. At her hospital bedside, her husband Chen Jianji finally reads the diary she protected with her life — and learns that through ten years of marriage, the man in her heart was always her childhood sweetheart, "A-Yan," Li Wenyan. She had only married Chen to repay the 100,000 yuan his family had put up to save her father's life.
His secretary then delivers a box Lin had prepared long in advance: a one-million-yuan check, a consent form for a C-section issued when her life was in danger, and their daughter's birth certificate. Her message: "We're even."
At the thought "If I could do it all over, I'd stay far away from her," Chen Jianji opens his eyes and is back in 2013 — in the high-school senior cafeteria, in the middle of publicly serving Lin Qingxue that heaping plate of meat. This time, he carries the tray away.
He refuses her breakfast, returns her notebooks, applies to change seats, settles accounts with her to her face using her own ledger, and accepts the two hundred yuan — "now we're even." He wins a basketball game while injured and exposes Li Wenyan for hiring thugs to cripple his leg. He throws the keepsakes she had hidden into a garbage truck in front of her. He holds back the word "Dad" in front of his future in-laws from his past life. He sees that the love letter he once believed she had written to him was actually written to Li Wenyan. And in his hands he holds a notebook that spontaneously reveals her diary — page after page of her saying she "hates him" and "loathes him."
But what he cannot see: she quietly finishes his homework for him, begs the teacher not to let him play injured, buys up all the little cakes he loves and then can't bring herself to give them away, and recreates his old "the hundredth customer eats free" stunt — paying for everyone's meal.
At the end of Season One, the tragedy of the past life repeats itself: Lin's father is injured in a fall at a construction site. Chen Jianji — who says "we're even" out loud — reaches the hospital in ten minutes, signs the forms, and brings in a renowned doctor. And on the bedside table, an old phone lights up with an incoming call: [Xiao Xue].
