Fang Yu, a senior student at Longcheng Key High School, has excellent grades and a reserved personality. His biggest secret is his penetrating eyes, his photographic memory, and his parkour skills that allow him to move freely through the night.
The peaceful campus life was broken by a huge campus loan from his friend Lin Fei. In order to rescue his friends, Fang Yu used his expertise in actual combat for the first time and narrowly escaped from the hands of peripheral members of the Blood Wolf Gang. However, he was targeted by this dark force and was forced to be involved in a dangerous deal.
The school is no longer a pure land, and the teacher's secrecy makes him realize that this city is much more complicated than it seems. Under the coercion of the Blood Wolf Gang, Fang Yu used his identity as a student to complete the task, but accidentally obtained a mysterious note and a micro locator not left by the Blood Wolf Gang.
This note, like a tentacle in the dark, led Fang Yu to "Shadow", a mysterious organization that focuses on information and technology. Under the guidance of the shadow, he glimpsed the "three-legged" pattern of the Dragon City underworld: the brutal Blood Wolf Gang, the deep-rooted Qinglong Society, and the White Pigeon Hall hidden under the cloak of legality.
A classmate who seems to have infinite glory, a USB flash drive that hides shocking secrets, and a historical file about the "Dragon City Purge" in the underground world of Dragon City completely pull Fang Yu, an ordinary student, into the whirlpool where all forces compete for the focus. The internal pursuit of Baige Hall, the Blue Dragon Society's tentacles penetrating into the campus, the endless entanglement of the Blood Wolf Gang, and even a mysterious force from outside Dragon City all pushed him into a desperate situation.
Everything is under the shadow of Dragon City.
