Love, romance, second chances, fairy-tale endings…these are the things Annika Dev believes in. Her app, Make Up, has been called the “Google Translate for failing relationships.”

High efficiency break-ups, flashy start-ups, penthouses, fast cars…these are the things Hudson Craft believes in. His app, Break Up, is known as the “Seamless for break-ups.” It’s wildly successful—and anathema to Annika’s life philosophy.

Which wouldn’t be a problem if they’d gone their separate ways after that summer fling in Las Vegas, never to see each other again. Unfortunately for Annika, Hudson’s moving not just into her office building, but into the office right next to hers. As if it’s not bad enough seeing his irritatingly perfect face on magazine covers when her own business is failing. As if knowing he stole her idea and twisted it into something vile—and monumentally more successful—didn’t already make her stomach churn.

As the two rival app developers clash again and again—and again—Annika finds herself drawn into Hudson Craft’s fast-paced, high velocity, utterly shallow world. Only, from up close, he doesn’t seem all that shallow. Could it be that everything she thought about Hudson is completely wrong? Could the creator of Break Up teach her what true love’s really about?