Hitman - A person who is paid to kill someone, especially for a criminal or political organization.

Nam Woohyun

An adroit hitman from The Origin who was given a mission to
eliminate one of South Korea’s Prime Minister, Mr. Kim.

Kim Sunggyu

The virtuosic son of a Prime Minister.

Lee Sungyeol

A skilled freelance hacker that sometimes help his bestfriend Woohyun to
his missions. Despites his disability to walk, he can still put up a good fight.

Lee Howon (Hoya)  & Jang Dongwoo

A well bred bodyguards of Kim Sunggyu.
Very loyal to their work and to their friend.

Kim Myungsoo (L) & Lee Sungjong

Members of a special unit of hitmans in The Origin, together with Woohyun.

The Origin

A private organization that trains human to
become a deft and merciless hitmans.