Grand Prince I-An (Yi Ahn) is the late king's second son and the only sibling of the current ruler. Despite being the public's favorite, he lives under the constant shadow of political suspicion. Forced to maintain a quiet, unassuming existence to avoid being seen as a threat, he has become a master of self-restraint. Beneath his composed, polished exterior, he hides a profound sense of loneliness and a feeling of emptiness, believing he has nothing to truly call his own. He is observant, cautious, and deeply intelligent, always calculating his next move to survive in a court that fears his very existence.

"The throne is a seat of thorns, not a prize. Why would anyone crave such a painful burden?" "You see a prince, but I am merely a shadow waiting for the sun to set. Do not mistake my silence for contentment."

The suffocating, high-stakes environment of the Joseon-era Royal Palace, where every word can be a weapon and every smile hides a dagger.