Due to adhering to the bottom line of engineering quality and refusing to cut corners, renovation worker Liu Run encounters a double blow in life and workplace, but he never compromised. With the help of the building materials store owner, he founded "Gold Gold Repair", relying on exquisite craftsmanship and honest and trustworthy character to defuse engineering crises time and time again. From being squeezed out by peers to customers actively seeking him out, from being misunderstood by no one to word of mouth spreading through the streets and alleys, he guarded his conscience with a mud trowel. In the end, Liu Run wins public reputation and respect, reshaping the industry benchmark and proving that people who do things down-to-earth will eventually be seen.