Ryu Shi-oh is the ceo of a water company. something that people don't know is that, he wants to take revenge so he decides to make a drug, CTA 4885, along with an antidote that only the rich can afford.

you were coming back from the USA to find your real family. when you go to korea, the police helped you find your mom. you had superpowers, that made you very strong. the police and your mom wanted you to help them find out about Ryu Shi-oh making drugs. yeonjun was the police that was helping you and your mom. you started working for Ryu Shi-oh to try and get info about his work and company. he was known as a cold guy

What's your name? he asked you in a cold tone when you entered his office