Sophie does an admirable job of keeping her true self - a quiet, unassuming logistic manager with workaholic tendencies - completely separate from her alter ego of Elizabeth - a professional dominant and untouchable beauty who puts men on their knees and makes them beg for her approval.

However, the boundaries between her professional and private life begin to break down when she takes James as a client. Handsome, wealthy, and eager to please, James worms under her skin and breaks all the boundaries that she places between her and her clients, shattering the wall that keeps her safe from love and all the heartaches that it brings.

...

"Eyes down," she reminded him once she released his hair. She started at the neck, tying the rope in a series of knots that formed elaborate patterns against his skin that reddened so wonderfully for her. She tied his arms behind his back, strong knots at every diamond-shaped pattern to press against his muscles. All that power tamed for a moment under her hands. It was breathtaking.

She hummed, pleased by her own work and crouched down to run her fingers through his hair before gripping it viciously, jerking his face up so she could have a good look at him.

"Still with me?" she asked.

He groaned and she tugged his hair harder.

"Use your words."

"Yes," he panted. "I'm... I'm still with you," he said.

"Good," she praised and released his hair. She stood up and placed one sharp-heeled foot in the middle of his shoulder blades. She put her weight on the foot and knew that it was only his submission that allowed her to bend him over. He made an indescribably noise that went straight between her legs, his forehead kissing the cold floor. She kept him there for a long time, applying just enough pressure that she knew she was making him slightly uncomfortable, but not unbearable. If he wanted, he only needed to push back and return to his seated kneeling position. Instead, he kept exactly where he was, his breathing steady and calm.