Felix, 18 — A kind, hardworking market boy from a poor family, supporting his mother and little sister after losing his father.

Hyunjin, 19 — The Crown Prince of Joseon, raised in luxury but suffocated by palace expectations. After learning of his arranged marriage, he secretly runs away to experience life beyond the palace.

Two boys from completely different worlds meet by chance one night, unaware that their lives are about to change forever.