Mia has spent her twenties paying for other people's mistakes: her father's gambling debts, her grandmother's hospital bills. So when Leo, the heir of a business empire, is publicly turned down by Serena, the dream girl he has chased for a decade, Mia walks straight into his worst moment and makes him an offer, being his devoted, decorative, and silent stand-in girlfriend. And Leo will pay her debts and bills. Leo accepts. Love was never part of the contract.
For five years, Mia plays the role to perfection. She is soft-spoken, adoring, and seems to be hopelessly in love with Leo, at every gala and family banquet. But behind the performance she knows what does she mean for Leo, an arm candy and a warm body at parties. So Mia never stopped planning to leave.
Leo, meanwhile, lives like Mia doesn't count at all. He shows off other women, take Mia as a locker-room talk with his buddies. One day, Leo makes a vow when he’s drunk, which is he'd marry Mia if she’s pregnant. Everyone laughs yet Mia takes it seriously.
When Mia finds out she’s pregnant, she go to Leo’s private club to tell him, overhearing him laughing with his friends and saying words that Mia would never forgive. After that, Mia makes an clinic appointment quietly and vanishes without a goodbye.
For a while, Leo enjoys the freedom and peace when Mia’s not around. However, in an empty drawer, he accidentally sees the pregnancy tester dropped by Mia and then loses control. He looks everywhere in the city, searching for Mia, but Mia is long gone......
