Phantom (South Korean TV series)

Kim Woo-hyun is the only son of a prominent police officer. Determined to make his own mark, he breezes through the police academy,^[7] and along the way racks up accolades, top of the class honors, a lot of praise and perhaps envy from his colleagues.^[8] Assigned to the cyber investigations unit,^[9] Detective Kim finds himself entrenched in an intense cat and mouse game with faceless enemies in the cyber world. Tirelessly hunting a hacker named Hades, he traces the hacker's location to an apartment building and arrives just in time to witness an actress fall to her death from the high-rise.

What appears initially to be a suicide case reveals a trail of crime and conspiracy as Hades broadcasts a video clip showing a perpetrator pushing the actress to her death. Suspected to be the perpetrator, Hades is hunted down by Woo-hyun, who finds out that Hades is in fact his past roommate in the police academy, Park Ki-young. Ki-young escapes, and later infiltrates the police headquarters in search of an important evidence proving his innocence. He is caught by Yoo Kang-mi, with whom he watches a video titled 'Phantom' that reveals a murder linking right back to Woo-hyun. Ki-young once again escapes, but calls Woo-hyun to meet up with him in an abandoned factory. The factory explodes, and one died while the other suffered severe burns.^[5] In a mistaken identity, Ki-young is sent to the hospital for treatment. Ki-young recovers and assumes Woo-hyun's identity, working together with Kang-mi to defeat the enigmatic nemesis and do justice for his friend's sacrifice.