Lin Yuan, a genius tugboat captain, relies on his exceptional feel for the water and disregards port regulations to carry out a dangerous operation, causing a disastrous accident. He is left with enormous debts, while his crewmate suffers severe injuries. Reduced to a low-ranking mooring worker, Lin Yuan endures grueling labor and comes to understand the importance of risk management and the laws of physics. He completely abandons his arrogance and devotes himself to studying comprehensive safety protocols concerning tides and fluid dynamics. However, an outrageously expensive intelligent pilot system conceals a fatal flaw. When a super typhoon sends an out-of-control liquefied gas carrier hurtling through the sea, no one in the entire port dares to venture outside. Having shed his recklessness, Lin Yuan takes an old tugboat into the raging storm, confronting both the natural disaster and mechanical defects in a breathtaking maritime rescue.