Lu Xun is an ordinary youth rushing around everywhere to raise tuition fees for his younger sister. Once at a fast-food restaurant, he gave the last chicken drumstick to the exhausted Shengding Group president Shen Shuwang, and the two became connected through this. Lu Xun successfully applied to become a group security guard, yet suffered all sorts of harassment from manager Qian. During a beating, he accidentally got electrocuted, awakening the martial arts inheritance left by his grandfather—invisibility ability. From then on, Lu Xun transformed into the invisible guardian, secretly resolving crises for Shen Shuwang, exchanging back swapped confidential documents, knocking away a drunkard, and secretly recording manager Qian's dialogue fabricating evidence.