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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, con l'aiuto di Re, Aurora, Kenan e Ale decide di intervenire per interrompere i simulati esami e mettere in ginocchio il sistema di classificazione delle scuole. Kenan scopre che per tutto questo tempo, una persona chiave vicina a Re ha svolto un ruolo importante nella spietatezza del sistema di classificazione della scuola.

With the friendship of the five under threat, Ale still believes in the strength of their bonds. Kai finds faith in Ale while learning to open her heart to Re. Ale discovers that she and Aurora are united by a secret from the past.

Kai, Re, Aurora, Kenan e Ale, hanno messo alla prova la loro ultima missione per smascherare la mente dietro il fatiscente sistema di classificazione delle scuole di Bina Indonesia. Viene finalmente rivelata la verità sulle persone a loro più vicine, che mettono in pericolo la loro vita.