In order to earn more money, Ma Dahu took his younger brother and co-workers to leave Zhou Zheng's team, and went over to Lao Dao, who offered high prices. But as work progressed time after time, he gradually discovered that behind the high income were also hidden chaotic management and safety hazards. After experiencing accidents and reflection, he finally understood that what is more important than immediate income is rules, responsibility, and the protection of those around him.