Josie Bianci was killed years ago on a train during a terrorist attack. Gone forever. It’s what her sister, Kit, an ER doctor in Santa Cruz, has always believed. Yet all it takes is a few heart-wrenching seconds to upend Kit’s world. Live coverage of a club fire in Auckland has captured the image of a woman stumbling through the smoke and debris. Her resemblance to Josie is unbelievable. And unmistakable. With it comes a flood of emotions—grief, loss, and anger—that Kit finally has a chance to put to rest: by finding the sister who’s been living a lie.