Twelve months. One contract. One hidden clause that could destroy them both. Sienna Vale signed away her life to save her family. Twelve months as the wife of Damien Blackwood, the coldest, most reclusive billionaire in the city, and in exchange, her family's debt disappears. Clean transaction. His money, her time, no touching, no feelings, twelve months and she's free. That was the deal. That was the contract she'd read. Every page. She should have read the addendum. On the wedding night, Damien drops the bomb: the contract requires an heir within the year — or the deal's off, and her family loses everything. No heir, no merger. No merger, no money. And no money means her family's debt comes due, and it doesn't come due small. It grows. Every month. Every day. Every night they spend trying. Now Sienna is trapped in a penthouse with a man who looks at her like a line item, in a bed she has to share, under terms she never agreed to. She hates him. She hates the contract. She hates the way her body answers him before her brain can stop it. She hates the way he says her name like a threat, the way he pins her against the glass, the way he makes her forget she's supposed to hate him at all. And Damien? He wanted a merger. He needed a wife, a child, a legacy — props for a board that won't approve the deal without them. He didn't want a stranger in his house, in his bed, in his life. He wanted a contract. That was all. That was the plan. But Sienna isn't the quiet, grateful little wife he ordered. She's sharp-tongued. Proud. Broke but not broken. She fights back in bed and out of it. She makes him pay for every clause he hid. And she makes him a promise: she'll make him want her, not the idea of her, not the heir she might give him, but her — and when he's in too deep to pretend otherwise, she'll remind him that contracts end. He doesn't lose. He's never lost. But he's never met anyone like her, either. And every month the countdown ticks down, every night they share a bed, every time he touches her he loses a little more control. The cold, commanding billionaire who treats marriage like a merger is starting to want something he can't put in a contract. And the woman who signed away twelve months of her life is starting to dread the day she gets it back. But the contract has teeth. And someone's out there threatening Damien's empire, someone who knows exactly what Sienna is to him, and exactly how to use her against him. The closer they get, the more dangerous everything becomes. The more they want each other, the more the contract tightens around them both. Twelve months. One heir. One contract that was supposed to be clean, and two people who were supposed to hate each other, now caught in a game neither of them can afford to lose. Everyone thinks they know how this ends. Nobody's right.