Rachel McCarthy’s Fiery Defiancé and the Brainy Stranger Who Unlocks Her Passion Stubborn and independent, Rachel McCarthy has a bone to pick with love and an even bigger one with her father. When her sister introduces her to Warner, a shy chemist with a heart as pure as his logic, Rachel reluctantly finds herself intrigued. Sparks fly as she learns there's more to Warner than meets the eye—perhaps, even a place in her heart she never knew existed.