Raised as an ordinary country blacksmith, Lee Soo (Seo Ji Hoon) never imagined he would rule all of Joseon; yet, at the age of twenty-three, that is exactly what happened to him. Now as king, Lee Soo finds it difficult to adjust to the constraints of palace life, especially when it comes to matters of the heart. Having loved Gae Ddong (Gong Seung Yeon) for as long as he could remember, he always thought she would be the one he would one day marry; but now, as king, that dream has become impossible. Since she is a commoner, Lee Soo has no chance of making Gae Ddong his bride, but that doesn’t stop him from trying. Hiring Joseon’s best matchmaking agency, Lee Soo asks the talented Flower Crew to transform his first love into a noblewoman. After accepting the king’s request, Ma Hoon (Kim Min Jae), Do Joon (Byun Woo Suk), and Go Young Soo (Park Ji Hoon) take Gae Ddong under their wing. There’s just one problem: transformations like this aren’t easy, and there’s a lot of work to be done! Risking their lives to help the king, will the Flower Crew succeed in helping Gae Ddong blossom into a beautiful noblewoman, or will this task prove that it’s impossible?