Jong-Goo, an innocent high school student who is a frequent target for bullies,
is saved one day by Chae-Young, a girl who learned karate from her father.
Impressed by her fighting skills, Jong-Goo enrolls in her father’s karate gym.
Hae-Sung, another student from their high school, also joins the class.
The three teenagers begin to grow together, both as individuals and as friends, through their shared journey in karate.
