Thirty-year-old Li Baolai had long been pampered by his mother, acting willfully and arbitrarily on a green-skin train, successively triggering numerous conflicts. Faced with harsh reality and his father's sudden serious illness, he experienced a sudden awakening. Shedding his arrogance and escapism, he lowered his pride to do hard labor to make a living, proactively faced his past mistakes, and shouldered the heavy burdens of the family. Having gone through hardships, he learned responsibility and gratitude, harvested understanding and genuine affection, and completed a belated self-growth and metamorphosis.