Zhao Yan, the sluice duty officer, is reborn back to the flood peak night. In his previous life, due to soft-heartedness, he listened to the pleas of a second-generation rich internet celebrity and Manager Wang, delaying the flood discharge, which led to the dam breach, the flooding of three townships downstream, and his own drowning. In this life, he decisively smashes the alarm cover and presses the special-grade flood discharge button. The crimes of four internet celebrity second-generation heirs bombing the mountain to divert the flow are exposed by drone aerial photography, and public opinion completely reverses. He guards the dam and also guards the lives of forty thousand ordinary people.