Mia Collins is a clumsy intern with a weak heart, chronic gastritis, and flat feet. Grayson Vale is a ten-billion-dollar CEO who just had emergency surgery with her rare Rh-null blood — and now feels every ounce of her pain in real time. Her ghost-pepper wings wreck his billion-dollar negotiation. Her leg cramp drops him to his knees at a signing ceremony. Her menstrual cramps send his private doctor on a midnight house call that turns up nothing. He can't remove the blood without dying, so he does the next best thing: promotes her to his floor, rewrites the company security policy, bans spicy food, and fires anyone who leaves a scratch on her. She's the most expensive liability on his balance sheet — and the only person in the world who makes him feel anything at all.