Kim So Eun is a timid, unadventurous high school student until one day she receives a mysterious note inviting her to the after school “Lucky or Not Club.” It’s there that she meets five flower boys who choose her to be their new leader. Each day, the club draws a random slip of paper that contains a fantastical and extraordinary mission the group must complete, the process of which draws out Kim So Eun’s adventurous and bold side.