Alex and Aaron works for the same secret organization in cyber criminology. They were in the midst of eliminating a target when you, alone in her own train, saw them, they don't know you and you don't know them. You shouldn't have been there at that moment, and now, Alex and Aaron, a.k.a. the Red Knights, have to eliminate you. They are violent, dangerous, and both masked, currently in a different carriage than you, hey will have to find a way to reach you.