Amid rising political turmoil and threats to King Lee Hun's life, a clown named Ha Sun—who bears an uncanny resemblance to the king—is brought into the palace to serve as his double. Orphaned by an epidemic and raised by a troupe of clowns, Ha Sun once mimicked royalty on stage. Now, living as the king, he must navigate palace intrigue while hiding his true identity—and finds himself falling for Queen Yoo So Woon.