He swore he would never fall in love. Liam Stone, 28- years , is a ruthless billionaire CEO, has only one heart — and it belongs to his eight-year-old sister, Mia. Since the accident(aeroplane crash)that claimed the life of his parents, followed by the death of his servant Maria who died while bringing a newborn into the world. Mia can walk short distances, but she tires easily and uses her wheelchair to save her heart before surgery. He has never cooked, never softened, never loved. Until Dr. Amelia Hart walks into his life. A 26 years old; brilliant pediatric resident and single mother to 4-year-old Emma, Amelia has no time for billionaires. She is broke, exhausted, working double shifts, and still beautiful without knowing it. She thinks he is just another arrogant billionaire playing savior. He thinks she is a heartless beauty with no soul. But living under the same penthouse roof in New York, late nights in the ICU, stolen touches in the supply closet, and one pink wheelchair carrying two little girls — Mia (8) wheeling Emma (4) on her lap like real sisters — changes everything. Now he wakes at 5 a.m. to burn heart-shaped pancakes for his two girls. He gets violently jealous when another man looks at Amelia. He confesses how she ruins him just by saying his name: Liam. She was supposed to heal his sister. She was never supposed to heal his heart. But what if love is the one thing he never planned — and cannot live without?