Lin Zi'an, an excavator operator burdened with 300,000 in debt, unexpectedly awakens a subterranean detection superpower deep at a construction site at midnight. With a single scoop, he unearths the stolen money of a decade-old unsolved case, immediately reporting it to the police to perform a meritorious service. Uncovering an unfinished building next, he dismantles a smuggled luxury car den. During construction in the old district, he smashes through an abandoned arms cache, saving the entire village's lives with divine precision control. Going from being chased by debt collectors to becoming a city-praised "City Hero," he drives his excavator along a path protecting national treasures, cracking down on criminal evils, and donating charity funds, while also harvesting a romantic destiny with female security officer Su Meng. Yet he does not know that forty-five meters deep at the bottom of the river, an even greater secret remains buried...