Min-hyuk (Choi Minho), an antisocial genius hacker, has played with computers as if they were toys since he was a little boy. He grows up learning hacking skills from his father, a terminally ill computer genius who runs an illegal gambling den to provide for his family's future. After his dad dies, Min-hyuk is adopted abroad. He immerses himself in computers and develops social phobia. When he turns 20, he returns to Korea and begins searching for X, who drove his father to his death. Following clues from his memories, he finds the Salamander Guru fortune-telling house and meets Seon-dal and Won-sam. To find the Salamander Guru who knows X's secrets, Min-hyuk has no choice but to help the fake gurus. With his brains and excellent hacking skills, Min-hyuk controls Seon-dal behind a mirror and finds codes his dad left by recalling his childhood memories one by one. Min-hyuk, who keeps his social phobia a secret, gradually opens himself up while living with Seon-dal and Won-sam.
