Chen Yuanshan, a 42-year-old administrative manager born in the 1980s, juggles multiple roles as a husband, father, and son. Every day, he struggles to balance work and family, silently shouldering everyone's burdens and making allowances for them, yet no one ever considers how exhausted he is. One late night, he comes across a video of a middle-aged man dyeing his hair blonde. It awakens a regret from when he was seventeen, when he secretly tried to dye his hair blonde but his father shaved it all off. After spending half his life suppressing his true self and becoming the dependable middle-aged man everyone expects him to be, he impulsively decides to dye his hair blonde after a night of drinking, just to reclaim the rebellious teenager he never got to be.