YoungJi is an ultimate gamer. She is a gaming fanatic... But she doesn't play just any kind of video game. She plays Assassin's Creed. Some people call her the game addict, and in a way, she kind of is. She always dreamed of being in an Assassin-like world. . . Her wish came true, whether she can accept it or not. She falls into another universe where she learns the ways of being a real assassin.She believes she is dreaming and only accepts it that way, and that way only, but when she starts to fall for an Assassin, she begins to change her belief that she actually is living in a real alternate universe. The only problem she has, besides the fact that she can't know that she's not dreaming, she falls in love with an assassin, named Yesung, whom she despises.  By her knowing that she isn't dreaming, what will happen to her? Will she even show her feelings toward the assassin? Will she be able to stay in that universe... Or even survive in the alternate universe..