Li Dazhu, a bricklayer, takes an electrician certification exam and heads to the city for work to save enough for his son's home down payment before his wedding, but faces rejection at every turn. His daughter secretly films his daily life and posts it online, where it unexpectedly goes viral. An experienced master electrician, Old Sun, takes him under his wing. Hiding his past serious illness, Li works two jobs and saves money tirelessly while continuing to study for a high-voltage electrician certification, hoping to secure a less physically demanding position. All he wants is for his family to enjoy a warm reunion meal together. Gradually, his ordinary life begins to shine with new hope and possibilities.