Flynn Vaughn Huntrex is not your ordinary night courier he is also a well-hired assassin dahil sa sobra nyang linis magtrabaho. Maybe today you're his client but tomorrow is different story, you as his target. Ang kanyang buong pagkatao ay sobrang misteryoso dahil walang nakakakilala ni isa sa kanya. Nagtatago sya sa alias na "Orion" at marami ang gigil na gigil syang patumbahin, he's such an excellent kill-throat. Ngunit nagulantang sya ng minsang may nakatuklas ng kanyang pagkatao sa katauhan ni Artemis Crest and he has no choice but to make an easy action...to end the person's life as soon as possible dahil maghahatid iyon ng kapahamakan sa kanya. But how will he do that? Will he kill a slow-poke, childish, annoying, stranger girl whom he epically meet? Or will he choose to live one-hell life with that girl while unleashing foreign emotions whom he thought he couldn't have?