Nothing takes love to the next level like a little rivalry between scientists. Mara, Sadie and Hannah are friends first and scientists always. While their fields may take them to different corners of the world, they can all agree on a universal truth: when it comes to love and science, opposites attract and rivals make you burn...Logically, Sadie knows that engineers -builders must build bridges. However, as a woman in STEM, she also understands that variables can change, and when you're stuck in a tiny New York City elevator for hours with the man who broke your heart, you deserve the right to burn that muscular blond bridge to the ground. Eric can apologize all he wants, but to quote her rebel leader, she might as well kiss a Wookiee. Not even Sadie's most elaborate of superstitious rituals could have predicted such a disastrous reunion. But while she refuses to acknowledge the siren call of Eric's steely forearms or the way his voice softens when he offers her his sweater, Sadie can't help but wonder if there might be more layers to her heartless enemy than meets the eye . Maybe, maybe even burned bridges can still be crossed....