Inhwa 14, with the failing health of the current King, the Royal Family push to marry off the Crown Prince in order to secure the Royal Family lineage. They force Crown Prince Shin to marry someone that was betrothed to him even before he was born. But he has a secret girlfriend, dance major Min Hyo Rin, and proposes to her

Chae Gyeong meets with the Queen to express her thoughts on her arranged marriage. She uses modern slang terms that completely confuse the Queen and leaves a bad first impression on her. Chae Gyeong sees the photo of her fat self in the newspapers and cries

Lessons for becoming a proper Crown Princess began as soon as she enters the Palace. She has to endure hard training, which includes learning proper Palace etiquette, memorizing the entire wedding process, with the Prince showing neither interest nor offering any help to her. Life in the palace is not easy, even from day one

He wants to ensure that they receive what is promised to them for agreeing to the marriage. While Shin is being very serious, Chae Gyeong, is busy enjoying the privileges of being the Crown Princess and slowly adapting to life as a member of the Royal Family. Chae Gyeong and Shin go to school but Chae Gyeong is treated like an outcast with the only person that actually talks to her being Yul

Yul, a transfer student in her class, turns out to be Prince Ui Seong. At first, Chae Gyeong has a hard time adjusting to life in the palace with its strict education and rules, but thanks to the warmth of the King and other Royal Family members, she begins to find the attractions of the Palace culture. Meanwhile, Hwa Yeong prepares to open a yoga center while plotting with Mr

After attending a number of events with Shin, she is loved by the public for her common looks and free spirit. Yul advises her to carry herself with dignity. At the opening of the yoga center, Hwa Yeong meets Hyo Rin and discovers that she is the Crown Prince's ex-girlfriend

Hyo Rin recalls the good old days with Shin and remembers what Hwa Yeong told her and sets her heart to win Shin back. Meanwhile, Chae Gyeong misses her family because she has not seen them since she moved into the Palace. But soon, she and the Prince are finally allowed to go visit her family

Different to Chae Gyeong's happy and close-knit family, the King is strictness personified and this makes Shin sad. Seeing this, Chae Gyeong comforts him. Shin prepares a car just for her

Chae Gyeong totals the car that was given to her and gets in trouble. After overhearing some girls at school badmouthing her, she feels hurt and asks Yul to just take her away from the Palace, to some place far away. In, Gyeong, Hwan and Hyo Rin all go to Thailand

Chae Gyeong is confined to the Palace as punishment for leaving the premises without permission. After seeing Chae Gyeong in trouble, Yul asks Hwa Yeong to make him the Crown Prince. With the help of Yul, Chae Gyeong successfully finishes the welcoming ceremony for Prince William

While riding her horse, she accidentally bumps into Princess Hye Myeong, Shin's older sister. Shin is happy to see his sister, whom he has not seen for a long time and uncharacteristically shows his softer side to her, telling her his deepest thoughts. The paparazzi photos of Hyo Rin and Shin are published in the Thai newspapers

Chae Gyeong becomes frustrated because she doesn't know what Shin's truth is. Chae Gyeong tries her best to get closer to him but the more she tries, the more frustrated and angry she becomes through finding traces of Hyo Rin around him. Eventually, she quarrels with Shin and breaks down in tears

Shin and Chae Gyeong try their best to cheer up the Queen Dowager who is feeling down. The kids at school are in awe of Yul's style change but Shin sees a deeper meaning behind it. Meanwhile, the Queen is busy keeping her eyes on Hwa Yeong, who has moved into the Palace

Yul races over as soon as he hears about the consummation plans. He is relieved to hear from Chae Gyeong that nothing happened and embraces her deeply. Shin witnesses this and is furious

They proceed to spill their hearts out and tell each other about their true feelings. The outburst of violence from Shin to Yul becomes known throughout the Palace. Hwa Yeong tells the Queen that she is not going to stand by and watch incidents like that happen ever again

Hyo Rin reminisce about the good times she had with Shin and head off alone to retrace her love. Hyo Rin is ignored by Shin and recalls Hwa Yeong's words and decides to go after Shin. Because of the Hyo Rin incident, Shin and Chae Gyeong become awkward with each other again

She asks him why he is always keeping everything to himself. Hearing this, he suddenly embraces her and asks her to stay by his side even if he is no longer the Crown Prince. Meanwhile, Hyo Rin goes to the Palace at the Queen's request and receives an offer from her to be her sponsor

Even the King wonders if Prince Ui Seong would be a more suitable candidate. Meanwhile, Hyo Rin discusses her career path with Shin. Yul confesses his feelings for Chae Gyeong, who is feeling miserable upon hearing that Hyo Rin and Shin had once promised to go abroad and study together

Watching her, Shin feels sorry and apologizes but she refuses to accept his apology. The two of them grow further apart. Meanwhile, Chae Gyeong hears rumors about her parents that claim that they are eliciting favors from the Palace

She meets her greatest crisis after becoming Crown Princess and wants to figure out a way to stop the rumors on her own. She refuses help from Shin and Yul. Shin becomes upset seeing Chae Gyeong worrying about how to fix her mistakes and orders the Myeongseong-dang to be repaired which only incurs the wrath of the King, Hwa Yeong and Yul

The Royal Family is enraged with Chae Gyeong's actions, which are not in line with the Palace laws. Seeing this, Shin is sad and angry at the same time. Because of the incident, the scandal of the Crown Princess blows up again and Hwa Yeong becomes anxious

Shin insists that rules and regulations are the strengths that hold the Palace together. Even though their methods are different, the person they both want to protect is the same. Chae Gyeong feels bad watching the people she loves and cares for getting hurt, while truth and logic abandon her

He maintains his innocence but all the evidence point back at him. Only Chae Gyeong believes that he is innocent and she is saddened by his troubles. Shin, knowing that someone actually cares and loves him, does not feel lonely anymore and is able to face the challenge with composure

In the midst of all this turmoil, Chae Gyeong and Shin's feelings for each other grow even stronger and they support each other to get through the storm. Chae Gyeong studies and tries hard to become someone who is a good match for Shin but the two are more alike than they realize. The King says that, "Apart from the truth of the incident, the person worthy of the imperial throne is the one who receives the love and honor of the people