UNTIL YOU CAME HOME

At 31, Jung Hoseok, better known as Hobi, is the successful CEO of the luxury fashion brand PRAYA. Warm-hearted, endlessly cheerful, and someone who makes everyone around him feel at ease, he has devoted his life to his family and career, staying far away from love and relationships.

His peaceful life shatters when his only sister, Ji-sha, travels to Paris with her husband for a vacation. A tragic car accident claims her husband's life instantly, while Ji-sha is rushed to the hospital for an emergency delivery.

The doctor who performs the life-saving surgery is Dr. Y/N, a 27-year-old renowned Parisian physician. Brilliant yet emotionally distant, she rarely lets anyone into her life. She successfully delivers a healthy baby girl, but despite every effort, Ji-sha loses her battle thirty minutes later. With her final breaths, Ji-sha entrusts her newborn daughter to Y/N, making her promise to care for the baby until her family can be found. With both parents' phones destroyed in the accident and no one aware of their trip, there is no way to contact Ji-sha's family.

Keeping her promise, Y/N raises the little girl as her own for six months, naming her Steffanie. During those months, the baby becomes the center of Y/N's lonely world, while Y/N unknowingly becomes Steffanie's entire universe.

When Ji-sha's family is finally located, Hobi arrives in Paris. After the funeral and mourning ceremonies, he takes custody of his precious niece. But returning to Korea brings unexpected heartbreak. Steffanie refuses to eat properly, cries endlessly, grows weaker day by day, and falls seriously ill. Countless doctors fail to find a medical reason.

Everything changes during a video call with Y/N.

The moment Steffanie sees her, her tears stop. Stretching out her tiny hands toward the screen, she softly calls her...

"Mama."

In that instant, Hobi and his family realize the truth