Gu Heng, a menial disciple, accidentally awakens the Passing By System. As long as he walks past someone, he can secretly deduct all their spirit stones without anyone noticing. To unlock the system's full functionality, he accepts an ultimate mission: pass within range of Lin Qingyue, the number one fairy of the Eastern Province, and 'rob' her during the sect competition. With his cleverness and the system, Gu Heng not only completes the mission but also accidentally passes by the Heaven-Piercing Tower. He continues passing by demon beasts and formidable enemies, rapidly advancing from the Qi Refining stage to the Half-Step Tribulation Transcendence realm, becoming the cultivation world's most mysterious hidden powerhouse. However, when he appears before everyone under a completely new identity, he attracts the attention of the Female Emperor, ancient patriarchs, holy maidens, and other powerful factions.