I just powered through this novel last week, and honestly, the title pretty much lays out the entire premise. The main character, our heroine, is fresh off a brutal breakup. Her ex was probably awful, the usual shallow type. In a classic move of self-destruction mixed with grand ambition, she decides the best revenge is to somehow marry someone richer, more powerful, and generally more impressive. That's the 'tycoon' part—think cold, aloof CEO with a mysterious past and a closet full of bespoke suits.
The plot then spirals into a marriage of convenience, a contract full of terms and conditions. They're strangers pretending to be a perfect couple in public. It's all about fake smiles at galas and pretending not to notice each other across a massive mansion. Of course, the real drama is the slow-burn attraction and the constant push-pull. He's got his own hidden motives for agreeing, probably something to do with business mergers or settling old scores.
Meanwhile, the ex inevitably pops back up, now jealous and scheming, which throws more fuel on the fire. The real question becomes whether this revenge-fueled marriage can ever turn into something real, or if it's all just going to implode spectacularly. I found myself skimming the middle bits waiting for the ex to get his comeuppance, but the dynamic between the leads was oddly compelling.