"God of High School" is an all-styles martial arts tournament for high schoolers from all over Korea. Jin Mori, who lives on his own after parting ways with his grandfather Taejin at a young age, is on his way to the preliminary for his region when he ends up chasing a snatcher. In the midst of his pursuit, he meets Han Daewi and Yoo Mira, two other high schoolers on their way to participate in the preliminary. The only thing on the line is your pride! The only thing you can trust is your fists! Choose any wish, and it will be granted! Such is the power of God! So begins the battle royal featuring the most powerful contenders from all over…

The team led by Park Ilpyo, one of the participants considered a top Key candidate, faces the team led by Gwim Gi. Gwim Gi calls upon his charyeok, Jack the Ripper, but Ilpyo uses his antiquated taekkyon fighting style rather than relying on charyeok. Meanwhile, Daewi is suspended from the competition after interfering in a match and hitting Taek. Mira scolds him, but Mori seems distracted. Something he sees on Ilpyo's back looks familiar...

After learning that his grandfather, Jin Taejin, has been confined, Mori rushes to set him free. Daewi and Mira await his arrival at the tournament with no idea what's going on. With Mori missing and Daewi suspended, Mira is forced to kick off the team match alone. She struggles against her opponent, Marin, who evades her attacks and counters with her own sword. When he calls it a National Treasure, it begins to glow white, and its true form is revealed...

When he learns of Nox's existence and their role in Jin Taejin's confinement, Mori swears to win the tournament and save him. But his opponent, Ilpyo, also has a good reason why he can't afford to lose. Four years ago, Seungah's sister and Ilpyo's cousin, Seungyeon, had her leg broken by Jegal and had to give up martial arts for good, and Ilpyo has made up his mind to become cold-hearted for her sake. Meanwhile, Feilong, whose attack on Mori failed, is eliminated... as Jegal wears a cruel smile.