Aggie Caulborn has lived in the shadow of her beautiful older sister her entire life, but she never complained. After all, the two were the best of friends. They went everywhere together, did everything together, practically shared a mind. So when her sister mysteriously perishes one summer while visiting their father in a tiny town up north, she isn't entirely sure what to do with her life. Years later, she thinks returning to the town of her sister's death will bring her closer, but instead it only prompts more questions. As more and more secrets about her sister surface, Aggie begins to wonder if her death was an accident at all.