Caitlin Riley survived and escaped horrid abuse at the hands of her ex-boyfriend, yet she lives life looking over her shoulder. Caitlin flees England to settle in Philadelphia. Although an ocean separates them now, her thoughts are often preoccupied with memories from her past, and she has serious reservations about her future. She keeps to herself as much as possible, convinced any little slip up could lead Stephen to find her. He had vowed he'd never let her go, and she's terrified because he always keeps his promises. Ethan Kendricks is a hardworking Army veteran who co-owns a gym with his brother. Through his own life experience, he knows a suffering soul when he sees one. When Caitlin signs up for kickboxing classes at the gym, he realizes there is something different about her. She's not his typical conquest; she's nervous and timid for the most part, yet snippets of her strong personality shine through every once in a while. Ethan's intrigued, but does he have what it takes to help her overcome her past? Can Caitlin and Ethan work through their individual issues to give love a chance, or will one of them end up sucker punched, knocked out cold before the bout even begins?