[Urban rivers and lakes + system + high martial arts + crushing + decisive killing + super cool]
The protagonist Qin Tian signs in an exclusive top-level guard every day, and the protagonist's combat power advances simultaneously with the guard; starting from a security company that is on the verge of bankruptcy, he breaks out from the bottom of the city, crushes the underworld forces, wealthy chaebols, official martial arts schools, and foreign forces. Finally, he holds the heaven-level guard, takes charge of the urban martial arts pattern, finds out the truth about the death of his parents, and reaches the pinnacle of world combat power.
