Sterling heiress Lottie has searched twelve years for her twin sister Sienna—and finally finds her at the docks, being bullied to the point of suffocation. As Lottie saves her, a truck sent by Marcus rams into them, injuring both sisters. In the chaos, Sienna—wrapped in Lottie’s coat—is mistaken for the heiress and rushed into a VIP ward, while Lottie, stripped of ID, is left in the emergency room. Marcus moves to seize the seven-billion-dollar trust. So Lottie borrows her sister’s identity to strike back, while Sienna, with Julian’s help, temporarily takes the heir’s place to hold the family together. What begins as an accident becomes a sisterhood’s revenge plan—exposing Marcus’s scheme across campus, boardrooms, and life-or-death crises, finding love along the way, and protecting both each other and the family name.