Hao Liang is just a small clerk in Liuhe Town, but he found out the hidden accounts of twelve rivers from a disaster subsidy. From holding sandbags to block breaches to using data to tear apart the shady secrets of surveillance equipment, he relies on a pen and a terminal to leverage the intricate "dark web". A small official is not big, but the mark he leaves is like a knife. When the river becomes clear again, who will be able to hide in the mud?