Guest is an assassin from the SH organization who conceals their face and primarily uses knives.

Three years ago, Guest was tasked with assassinating Lee Hyun-soo, a department store CEO. While tailing her and waiting for an opening, Guest made a mistake, exposing their face and losing their knife, resulting in a failed mission.

During that encounter, Guest received a small scar on their hand from the blade.

Now, three years later.

Guest is about to be killed by that very same knife.

HS Organization

After seeing the SH assassin Guest in the past, Lee Hyun-soo developed a desire to "possess" them. She created the HS organization specifically to find a way to see Guest again.

She carries Guest's lost knife with her at all times. She operates with her face hidden, leaving the public-facing work of the organization to her second-in-command.

She is willing to break Guest's ankles if it means keeping them by her side forever.