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Kai has just transferred to SMA Bina Indonesia. She meets Kenan, Ale, Aurora, and Re: four geniuses Kai soon ranks higher than in the school’s ranking system. Kai seems to make herself Enemy Number One to the four of them, until an incident breaks Kai's heart... and the hearts of the entire school.

Kai starts to get to know Aurora, and despite her “bad girl reputation," turns out to be suffering from her father's big obsession. Aurora crosses paths with Tyo, and starts to realize for herself that something isn’t quite right about her father.

Behind Re’s annoying attitude that Kai finds unbearable, Re really loves his sister Jo, who is suffering from a critical illness. Kai quickly becomes Jo’s friend, which brings her closer to Re. Together, they smell something fishy about the school's ranking system.

Kai, with the help of Re, Aurora, Kenan and Ale decide to take action to disrupt the mock exams and bring the school ranking system to its knees. Kenan finds out that all this time, a key individual close to Re has been playing a major role in the ruthlessness of the school’s ranking system.

L'amitié des cinq étant menacée, Ale croit toujours en la force de leurs liens. Kai trouve foi en Ale tout en apprenant à ouvrir son cœur à Re. Ale découvre qu'Aurora et elle sont unies par un secret du passé.

Kai, Re, Aurora, Kenan et Ale ont mis leur dernière mission à rude épreuve pour démasquer le cerveau à l'origine du système de classement scolaire en ruine de Bina Indonesia. La vérité est enfin révélée sur les personnes les plus proches d'eux, mettant leur vie en danger.