Li Donghai was taken in by Chen Dayong, a master mechanic, when he was young. After studying under him for three years, he was scorned and expelled from the apprenticeship. Years later, he discovered that his paralyzed master had been abandoned in a rundown shop by his three biological sons. Putting the past behind him, Li Donghai brought his master home and, together with his wife, cared for him devotedly for eleven years. When the old family home was demolished, Chen Dayong received six million in compensation. He gave all the money to the sons who had never fulfilled their filial duties, while repeatedly humiliating Li Donghai, who had cared for him for eleven years, and even denying him a place at the dining table. Completely heartbroken, Li Donghai decided to send his master back. However, all three sons made excuses and refused to take him in. Chen Dayong threw a tantrum and threatened to kill himself, but Li Donghai remained unmoved and walked away without looking back. Eleven years of master-and-disciple ties were finally over.