The story revolves around a conceited and demanding superstar who is invited to an award ceremony in Asia. His perfection makes people think that only a popular actress could match him, but surprisingly, an anonymous woman appears to congratulate him in front of the media. However, her sudden fainting forces him to carry her away under everyone's gaze, turning this incident into sensational news. An experienced journalist naturally won't miss this headline and continues to track the car to its destination. The agent tries to persuade the journalist to stop following, but instead of returning, he insists on taking photos inside the car, only to find it empty. It turns out that they had planned a clever diversion strategy to escape from the gossip reporters. He let two bodyguards switch cars halfway, allowing him to return home with the woman.
After placing her gently on the bed, he reflects deeply. She was the only girl he ever loved in his past life. A few years ago, when he fell ill, she wiped him down, and when his mother passed away, she became his pillar of support. Over these years, his admiration and longing for her have almost become uncontrollable. On the other hand, he resents her because she left without saying goodbye on the day he planned to propose to her. Since then, loneliness, sadness, and emptiness have turned him into a walking dead man. Now, she has reappeared before him without a word, evoking the same feelings again. Why does she always treat him like this? Amidst mixed emotions, she wakes up with eyes full of tender love but can't answer the question that has been swirling in his mind for years: why did she leave him back then? Knowing that she caused him great harm back then, but now as a superstar, their worlds are completely different. Although he treats her rudely, he still wants to find an opportunity to compensate for her. He and his company came up with a brilliant plan to prevent the scandal from spreading, which is to spread rumors that she is just his fan. Due to the scandal, several film and television contracts were canceled. Filled with guilt, she agrees to work as his personal assistant for a year and sincerely pleads for the chance to make up for leaving him without a word back then. Despite being driven hard by him, she silently endures because she cannot tell him the reason for her disappearance - she has leukemia. Her doctor and fiancé returned to the country with her and have always supported her by her side. Her promise to him is that once she compensates him, she will truly choose to be with him.
Their paths cross multiple times, each encounter filled with tension. Although she doesn't understand her own feelings, she is deeply affected by his over-the-top behavior, especially his jealousy whenever someone picks her up or gets close to her. He uses various methods to make her know that he also has someone who loves him, even pretending to fall in love with others, unknowingly making her deeply involved. This extreme behavior also ignites the jealousy of another girl who secretly loves him. Although he only sees her as a younger sister, he uses the compensation period to start working in the hospital, while planning to let his son take charge of the hospital. But he shows no intention of working; all he does is flirt and even has affairs with his ex-wife.
He believes that she stole his identity, so he wants revenge. Her arrival at the hospital further ignites his jealousy when she discovers that he is not the real son but merely the child of a previous marriage. The disappointment and fear of losing favor lead him and his vengeful ex-wife to conspire to break off their relationship. Meanwhile, such entertainment journalists feel there’s plenty of material to dig into and try to prevent scandals from happening, but behind the scenes, there's an even more powerful force. The company moves around, seemingly responsible for fan matters and lion-tiger industry affairs, but in reality, she has invested in the magazine covering all expenses related to journalist tracking and scandals. Additionally, a girl obsessed with him squats daily and nightly, becoming a tool used to destroy his reputation. Due to his antics, he must go to the hospital, feeling both anxious and angry about her possible disappearance, yet unable to control his worry for her. He starts searching for her everywhere. Later, he learns that she is sick. Regardless of his superstar status, he searches every hospital but still can't find her. Regret and sorrow overwhelm him, yet seeing him brings her joy. So, she decides to return home promptly.
In the chaos, he hears an announcement that an emergency patient needs blood donation and decides to donate. Unbeknownst to him, the blood recipient is her. The blood flows from one heart waiting to replenish another. During her rest, she meets the doctor who thanks him for donating blood, but still unaware of the recipient, he continues to inquire about her whereabouts. The refusal to inform him deepens his misunderstanding. In reality, the only barrier between them is a curtain between two hospital beds.
Returning to work, he expresses his pain and misunderstanding in increasingly extreme ways. As her condition worsens, this worries him greatly, so he requests stopping everything in Thailand and returning to the U.S. with her. From that day, doubts begin until she starts believing that he truly hates her and has a lover. Determined, she decides she is the one who should leave. She plans a special dinner to evoke memories of their past love, trying to leave behind warm memories for him before departing. At this moment, love, passion, and memories flood both their hearts, almost leading her to confess her desire for love's response. He decides that starting the next day, he will cherish and protect her with all his might. But it's too late because she leaves before sunrise, preparing to return to the U.S.
Deeply hurt, disappointed, and enraged, he can't believe he lost her again. Memories of his frantic search for her resurface in his mind, striking his heart. Facing unbearable pain, he refuses to let tragedy repeat itself and rushes to the airport, crazily chasing after her. To his disbelief, she miraculously appears before him again. Without hesitation, he takes her away, running towards his car, leaving the bewildered person behind. When regaining consciousness, he goes to look for her and knows she's at home. Unexpectedly, they meet again during his search. They tacitly understand each other, but during this search, mutual affection grows between them as they team up to subdue the killer sent to harm her. Meanwhile, she reveals to him that during her absence, she was still the only one in his heart. The thirst for love in these two loving hearts will lead the story where? Can they ultimately reclaim the lost beauty and rebuild happiness?