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.