HOW DID IT ALL STARTED ?

7 internationally popular boys from South Korea are trying their best to survive a highly infectious apocalypse. They meet a girl who lost her everything.....her family, her friends, her teachers, even her other loved ones...Will they be able to survive together or will they die fighting for their lives ?
What was this virus ? Who created it ? Was there any cure for it ?
Read this book to know the answers for these questions.