Season 1
These three students try to hide their special abilities from other people, while their parents struggle to protect them from being used by other people.
Episodes
Ordinary high school student Bong-seok hides a secret.
Mi-hyun hides Bong-seok's superpowers, but the mysterious incidents on social media make her anxious.
The closer Bong-seok grows to Hui-soo, the more risk of exposure he draws
Bong-seok's secret is exposed and Hui-soo walks him home. Frank searches for his third target.
Hui-soo assures Bong-seok that his secret is safe by revealing her own secret.
Jeon Gye-do's past is revealed. The NIS finds out information about Frank.
Frank recalls his past as he eliminates his targets. After Frank's visit, Mi-hyun suppresses her son.
In 1994, Mi-hyun is ordered by Deputy Director Min Yong-jun to get close to and learn about the thought process of black ops agent Kim Doo-sik.
Doo-sik and Mi-hyun grow closer, and Doo-sik suggests that they deceive Min Yong-jun.
Ju-won, who leads his gang with his monstrous abilities, is betrayed and becomes a fugitive.
Ji-hee gradually opens up to Ju-won.
Doo-sik shows up at Mi-hyun's apartment with a plan to escape Deputy Director Min for good.
After the Black Team disbands, Ju-won is offered a mission by Deputy Director Min to revive the team.
Jae-man tries to save his wife with his strength and Ju-won is sent in to subdue him.
Mi-hyun and Ju-won watch the auditorium video and head to Jeongwon High, while Gye-do discovers Jun-hwa.
With Mi-hyun's question, Il-hwan reminisces about his past.
Jun-hwa attacks Hui-soo, and Bong-seok awakens his powers to save her.
Mi-hyun asks Deok-yoon where Doo-sik is, and he tells her what happened in the North.
The fight takes a new turn with the appearance of a new North Korean superbeing, Jae-seok.
Parents and children fight to protect each other. Will this repeated war ever end?
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