After their mother dies suddenly, two sisters travel to Brooklyn to sort out her belongings. While there, Luna discovers something impossible: she can travel back in time to 1977.
In the past, she meets her mother as a young woman and begins to uncover long-hidden secrets about her life. Hoping to change events and prevent her mother’s death, Luna becomes increasingly determined to alter the past. However, she soon realizes that changing history could have serious and unpredictable consequences for the present.