When the crown prince is killed, his twin sister assumes the throne while trying to keep her identity and affection for her first love a royal secret.
Years after the crown princess delivers forbidden twins, Yi Hwi meets a court maid who looks exactly like him, to his amazement and his mother's horror.
Dam I tearfully bears the weight of the crown in guise of her brother. Jung Ji Un races against time to find a herbal remedy for a peeved patient.
Hwi spares Ji-un his life thinking they won't ever cross paths again. Later, she's startled to see him lurking inside the palace walls.
Ji Un proves to be a formidable opponent for Hwi, who's determined to make her newest royal tutor resign. Yi Hyun takes Hwi out on the town.
Ji Un's good-hearted attempt to make his pupil warm up to people in the palace goes awry. Prince Changun tests Hwi with an intoxicating surprise.
A familiar book on the crown prince's desk baffles Ji-un. Running out of time and the means to save his friends, he asks Hwi for help.
Hwi earns a chance to gain the king's trust during the Ming envoys' visit, but an ill-tempered guest tests the limits of her patience.
Ji Un comforts a tearful Hwi in his arms. Hyun and Ji Un team up to figure out the envoy's secret after a suspicious man visits his quarters.
The queen dowager tells the crown prince to wed. As Ji Un recalls previous night's events, he realizes the reason behind his rollercoaster of emotions.
After a joyous day together, Hwi gives Ji Un her answer. Shin So Eun and No Ha Gyeong visit the palace as candidates to become the next crown princess.
Hyun visits Ji Un at his new clinic. A furious Hwi holds Prince Changun accountable for his wrongdoing and faces staggering backlash as a result.
The king is asked to answer to overwhelming appeals for the crown prince's removal. Reentering the palace, Ji-un promises to protect Hwi no matter what.
Hwi carefully reveals her secret to Ji Un. Lord Sang Heon unleashes his royal ambitions and makes way for the future king.
Hwi and Ha Gyeong spend their first night together. Reinstated into a palace operating around Lord Sang Heon, Ji Un lies low to serve the wounded king.
Moving in silence, Hwi strategizes retaliation against her grandfather. Kim Ga On reappears in front of the king with a startling confession.
Yoon Hyeong Seol sets out to find the damning ledger and keep his promise to the king. Prince Won San puts two and two together about Hwi's identity.
Rumors about Hwi and Ji Un's close relationship circulate amongst the palace staff. To protect his son, Jung Seok Jo takes matters into his own hands.
Hyun and Lord Sangheon learn of Prince Wonsan's secret ploy to dethrone the king. Hwi prepares to take down her grandfather — alone.
Prince Wonsan ruthlessly proves his ambitions — and worthiness — for kingship to Lord Sangheon. Hwi prepares to abdicate the throne.
Returning to the palace with a vengeance and an army, Lord Sangheon and Prince Wonsan spare no one in their bloody path to the crown.
Complete episode guide for The King's Affection with detailed information about every season and episode including air dates, summaries, ratings, and streaming availability in United States.
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