The world's most fearful coward, 'Hyeon Eun-seop', has his girlfriend 'Kim Chae-na', whom he dated for 3 years, appear before his eyes as a ghost! Because of 'Chae-na' who suddenly blames herself for everything and asks to go together, 'Eun-seop' is so shocked that he almost faints and falls down, holding the back of his neck... What's wrong with a girlfriend he doesn't even remember? A ghost?!! No, but more importantly, are you really my ex-girlfriend? After 3 years, if a ghost doesn't receive a man's yang energy, it becomes an evil spirit? I want to run away, but I feel sorry for her and want to help her in some way, but it's not easy to appease this stubborn ghost 'Chae Na'. Indeed, the most cowardly of all cowards, 'Hyeon Eun-seop' Will he be able to safely bring the ghost 'Kim Chae-na', who is said to be his ex-girlfriend back to life?