The ability to transform.. is a curse? 17-year-old Bibi Na has a special power — she can form a chrysalis, and just as a caterpillar transforms into a butterfly, she can emerge with a new look, personality, and abilities. To escape her trauma of being bullied in middle school, she decides to transform. Things get complicated when she transfers schools and meets Yeonwoo, a boy who seems to know about her past. Will Bibi’s power be a gift, or a curse?