Sylvie is fourteen years old when her eighteen year old sister, Persephone disappears and is found three days strangled to death. Who murdered Persephone? Could it have been Ben, Persephone's boyfriend who she would sneak out at night to meet up with and who was the last one she was with on the night she disappeared? Or could it been someone else?
Sylvie lives with the guilt of the night that her sister went missing. Sylvie locked her sister out by locking the window so her sister would get caught by her mother for sneaking around with Ben, who their mother did not know Persephone was dating.
Sylvie's mother starts to turn to alcohol and becomes a non-existent mother following the disappearance and death of Persephone.
Sylvie gets out of the town, but on her thirtieth birthday, she gets a call from her Aunt Jill about how her mother has cancer. Sylvie comes back to help her mother who she does not want to be around.
While being in town, she runs into Ben who is now a nurse. This sends Sylvie into looking more into her sister's death and finds out many secrets that could possibly solved the cold case.