Like millions before her, Emelia Aaron has the chance to go back and make the 'correct' decisions. On her twenty-first birthday, when she registers her Right to Amend, Emelia is filled with hope for the first time in years. Hope for her sister, Finola. Hope for her and Gabe. Maybe even hope for humanity. But fate forces her hand far quicker than she could have imagined and Emelia quickly learns that acting upon the little envelope containing her amendment is far harder than sending it. Even armed with a message from the future, the way forward is far from clear. Faced with an impossible decision, her sister or her soulmate, Emelia must try and predict exactly just how far the ripples of her amendments will spread…