After being separated from his wife and son for 25 years, self-made billionaire Li Zhengyang devises an unusual plan - disguising himself as a construction worker to reconnect with his long-lost son Li Ming. What he discovers breaks his heart: Ming is drowning in debt while struggling to pay for his daughter's congenital heart disease treatment. When the construction company refuses to pay his wages, Zhengyang faces an impossible choice - reveal his true identity to save his granddaughter, or risk losing his son's trust forever.