
One unexpected encounter with a billionaire leaves her pregnant with twins. His mother is convinced she's the perfect daughter-in-law, so he offers her a one-year contract marriage. It was supposed to be a business deal—nothing more.Too bad falling in love was never part of the agreement.

Su Nian is shocked to discover she is pregnant with twins. She finds herself in a deep dilemma: on one hand, she remembers Lu Yanting claiming to be infertile, and on the other, she is struggling with the crushing burden of her sister's massive medical bills, leaving her so desperate that she considers an abortion. Meanwhile, Lu Yanting’s grandmother has been searching for three years for a woman with a "Lucky Lotus" birthmark, believing it to be the only way to cure Lu Yanting’s perceived infertility. The two cross paths in a hospital hallway, where the grandmother is overjoyed to spot the birthmark on Su Nian’s collarbone and soon discovers she is pregnant. Upon learning that an "unknown" man got Su Nian pregnant, the grandmother is incensed and relentlessly berates the "scumbag" for his irresponsibility, completely unaware that she is actually cursing her own son, Lu Yanting.

While caring for her sister at the hospital, Su Nian receives a call from Manager Lin, who maliciously demotes her to a hotel cleaner for taking leave. Meanwhile, at the hospital, Old Mrs. Lu discovers a "lucky birthmark" on Su Nian and becomes convinced that she is the fortunate soul destined to carry on the Lu family line, deciding to have her marry her son, Lu Yanting. Lu Yanting, currently indulging in a hedonistic lifestyle at a bar, coldly rejects his mother's arrangement. Su Nian returns to work at the hotel, where she faces exclusion from her colleagues. Just then, Lu Yanting, the wealthiest man in the capital, arrives to inspect the hotel. Manager Lin assigns Su Nian to handle the cleaning duties in the top-floor suite, setting the stage for their inevitable first encounter.

Su Nian is working as a cleaner in a luxurious club casino when she is rudely chased away by Supervisor Lin. Meanwhile, Lu Yanting, the wealthiest man in the capital, is in the middle of a million-dollar gambling match. After rejecting the flattery of numerous socialites and PR staff, Lu unexpectedly recognizes Su Nian in the corner and insists that she be the one to open the game. Nervous and completely out of her element, Su Nian rolls a dismal score of two on her first attempt, drawing harsh mockery and humiliation from Supervisor Lin and the others. However, instead of getting angry, Lu Yanting stands up, pulls Su Nian into an intimate embrace, and holds her hand, telling her to blow on the dice, displaying a fierce sense of possessiveness and a desire to protect her.

Inside the casino, Lu Yanting intimately teaches Su Nian how to shake the dice, landing a maximum roll of twelve and stunning everyone in the room. The onlookers whisper in shock, amazed that the notoriously untouchable Lu would be so affectionate toward a mere cleaner, leading many to suspect he has taken a fancy to her. In private, Lu Yanting experiences a physical reaction to Su Nian and demands she spend the night with him, but Su Nian insists that their encounter that one night was merely an accident driven by her need to save her sister, and she rejects him, citing her status as a cleaner. However, Su Nian soon receives a call from the hospital, learning that her sister Su Xiao’s condition has worsened and she urgently needs 200,000 for surgery, leaving her with nowhere else to turn.

Desperate to cover her sister Su Xiao's urgent 200,000 medical expenses, Su Nian is left with no choice but to set aside her dignity and head to private room V999 to seek out the powerful Lu Yanting, known as Lord Lu. She offers herself in exchange for the money, but the cold and suspicious Lu Yanting mocks her, accusing her of playing hard to get. Under his humiliation and relentless questioning, Su Nian tearfully admits her true motive. Ultimately, Lu Yanting forces her into the deal, and Su Nian sacrifices herself to save her sister's life, while Lu Yanting declares that he alone will decide when their relationship ends.

To raise money for her sister Su Xiao’s surgery, Su Nian is forced to continue her contractual relationship with Lu Yanting. Just as she is about to leave after their encounter, Lu Yanting catches her trying to hide a medical report. Sensing something is wrong, he coldly demands to know if she is unwell, leaving a panicked Su Nian struggling to cover it up. Torn by inner turmoil, she considers whether to reveal her pregnancy, knowing he is the father. Finally, gathering all her courage, she calls out to him, determined to explain the truth.

Su Nian is about to tell Lu Yanting about her pregnancy, but is interrupted by his mother's fake medical emergency. Rushing back to the Lu residence, Lu Yanting finds his mother perfectly fine; the entire ruse was merely a tactic to pressure him into marriage and having children. Old Mrs. Lu presents a photo of a woman with a "lucky birthmark," claiming that her unique constitution can break Lu Yanting's "curse of childlessness." Unbeknownst to them, the woman in the photo is none other than Su Nian, who is currently lost and helpless, believing she will never see him again.

To ensure the continuation of the Lu family line, Madam Lu brings a photo of Su Nian to urge Lu Yanting to get married, only to be coldly rejected. When Madam Lu brings up rumors about his impotence, Lu Yanting feigns indifference, yet he experiences a strong physical reaction at the mere thought of Su Nian. Lu Yanting immediately orders Chen Feng to track her down, while Madam Lu decides to investigate Su Nian herself, drawn by the rumors of her good luck. Eventually, both Lu Yanting and Madam Lu arrive at the hotel where Su Nian works, unaware that she is currently busy working as a cleaner.

Su Nian, a hotel housekeeper, suffers a sudden bout of morning sickness while on duty, which happens to be witnessed by Mrs. Lu, mother of Lu Yanting, who is visiting the hotel. Seeing Su Nian’s diligent yet solitary pregnancy, Mrs. Lu feels deep sympathy. Mistakenly believing that the "arrogant and irresponsible" man Su Nian mentioned is just an ordinary deadbeat—unaware it is actually her own son, Lu Yanting—Mrs. Lu is furious and urges Su Nian to terminate the pregnancy, while simultaneously entertaining the idea of having Su Nian as her daughter-in-law. Due to her financial struggles, Su Nian reluctantly agrees to let the older woman take her to the hospital. A colleague witnesses Su Nian departing in a luxury car and starts spreading malicious rumors, and shortly after, a dropped medical report reveals the secret that she is carrying twins.

Lu Yanting rushes to the hotel to find Su Nian, only to be met with malicious slanders from hotel staff and a woman in black, who claim that Su Nian leads a promiscuous life and is pregnant with another man's child. Upon seeing Su Nian's pregnancy diagnosis, Lu Yanting recalls her previous hesitation to speak and suddenly realizes the child might be his, prompting him to order his assistant to track her down immediately. Meanwhile, under the coercion and pressure of a mysterious woman in a qipao, Su Nian is forced to go to the hospital for an abortion. The woman even bribes the hospital by promising a donation of a building in the Lu family's name to skip the waiting list and perform the procedure immediately. Torn with indecision, Su Nian finally nods in agony.