Eighteen is supposed to be the beginning.

Your eighteenth birthday is meant to be one of the best days of your life. The photographs, the presents, the people you love gathered around you, pretending they haven't already eaten half the cake.

But what happens when your birthday comes with a warning?

A message from yourself.A countdown you can't explain.And the horrible feeling that someone knows exactly how your story ends.

As the days pass, the questions multiply, the secrets start to surface, and the people closest to you become harder to trust.

Because sometimes the scariest thing isn't not knowing what will happen.

It's realising you might already know.