An ER doctor drowning in medical school debt accepts a contract marriage proposal from a cold, calculating billionaire CEO who needs to clean up his playboy image before a major company merger. The contract is airtight separate bedrooms, no physical contact, scheduled public appearances only. But when his younger sister, recovering from addiction, comes to live with them unexpectedly, they're forced to fake intimacy in private too. The doctor's natural warmth begins cracking through his icy exterior, while she starts to see the wounded man beneath the billion-dollar suit. The real crisis comes when the merger falls through and the contract becomes financially pointless but walking away now means something entirely different.