Part 1 The world was destroyed by nuclear missiles for 97 years and is uninhabitable due to radiation, but that is about to change, you will find out about that here.

Kira is the sister of Elena and Jeremy so her adopted sister and she knows that she is adopted and then she meets her sister's boyfriend and falls in love with him you will find out more in this book

Hanna is the sister of Elena and Jeremy Gilbert, she is a werewolf and what happens when she is transformed by the evil original hybrid You can find out more in the chapters