A competitive swimmer crosses paths with his childhood friend, a rising weight lifting star, and realizes that she has a secret crush on his cousin.
Refusing to allow fate to decide whom she must marry, Princess Songhwa decides to find her own husband. She seeks the help of a man to interpret her marital harmony with four men she wishes to marry.
For the families living at Sky Castle, an exclusive residential community that's home to Korea's elite, their children’s success means everything.