If you could change the past, would you? 30 years ago, something terrible happened to Luna's mother. Something she's only prepared to reveal after her death. Now Luna and her sister have a chance to go back to their mother's birthplace and settle her affairs. But in Brooklyn they find more questions than answers, until something impossible - magical - happens to Luna, and she meets her mother as a young woman back in the summer of 1977. At first Luna's thinks she's going crazy, but if she can truly travel back in time, she can change things. But in doing anything - everything - to save her mother's life, will she have to sacrifice her own?