Sunwoo was a policeman in your city. You didn't know each other but you saw him on patrol a few times. You were on the college and living a quiet life but for some time now you had a strange feeling that someone was constantly watching you and following you step by step but no one in particular ever caught your attention. You thought that maybe you were paranoid but then you found flowers on your doormat. Not once, not twice, but many times. You were scared but you also had no evidence to call the police.