Claire, an ordinary waitress, happens to rescue a little girl named Ava who has been hurt. Billionaire Lucas, seeking to comfort his traumatized daughter, signs a six-month contract marriage with Claire. Entering the lavish Grant estate, Claire heals Ava and also changes the cold, distant Lucas. Facing the family's hostility, the exposure of the contract, and one conspiracy after another, the three break through the shackles of money and blood ties — proving that a true family is made of people who choose one another willingly.