The daily routine at KO One High School is shattered by a golden light falling from the sky. A mysterious young man crashes down from the roof, with no memory of who he is and only a pendant around his neck bearing a flame pattern and made of unknown material: the Flame Core Pendant. Jin Baosan names him Yan Zhui, and the quiet transfer student joins KO One, a class full of superpowers and fiery passion.
Yan Zhui is surrounded by mysteries. In moments of danger, he can unleash a faint red flame ability, and its source seems closely tied to the Flame Core Pendant around his neck. When the pendant heats up, fragments of broken memories flash through his mind: a swirling tunnel of light, and men in black chasing him. His battle power index fluctuates with them, but he still cannot control it. Wang Dadong, Lei Ting, and the others are determined to protect their unusual new friend. They help him adjust to school life while secretly investigating the pendant's origins.
Then a man in black, who calls himself a “space-time observer,” suddenly appears. He declares that Yan Zhui and the Flame Core Pendant are “a threat to the order of space-time” and attempts to take him away by force. Faced with an unknown threat from beyond time and space, Yan Zhui, supported by his friends at KO One, begins trying to control the restless power within him as he searches for the past he has forgotten. Who is he really? Why is he bound to the Flame Core Pendant? And what danger will the “space-time rift” mentioned by the man in black bring? An adventure of memories, superpowers, and bonds is just beginning in the classroom of KO One.
