Natalie Quinn is drowning in debt trying to cover her mother's medical bills. Desperate and out of options, she agrees to a deal offered by her cold stepfamily: marry Sebastian Klein — rumoured ex-con, family black sheep, and by all accounts a dead-end match — and the money is hers. What Natalie doesn't know is that Sebastian's reputation is entirely by design. Behind the rough exterior is a billionaire hiding his identity for reasons of his own, and their arrangement is about to become a lot more complicated than either of them planned. When Natalie's stepsister discovers the truth and plots to steal Sebastian for herself, the carefully constructed walls between them start to crack — and both have to decide what, and who, they're actually willing to fight for.