A sequence of connected love messages scribbled in library art books convinces awkward grocery store clerk Hyun-chae that a mysterious man known only as "Vincent" is pursuing a romantic relationship with her. Meanwhile, a buddy from her high school days, the shy, eccentric subway driver Dong-ha, relocated to Seoul to ACTUALLY seek a relationship with her, which she refuses in favor of the ersatz paper chase supplied by her mystery man, at one point passing Dong-ha off on her best friend.