Prologue: Vault 101
In the early days, thousands were spared the horrors of the holocaust by taking refuge in enormous underground shelters, known as vaults. But when they emerged, they had only the hell of the wastes to greet them - all except those in Vault 101. For on that fateful day, when fire rained from the sky, the giant steel door of Vault 101 slid closed... and never reopened. It was here you were born. It is here you will die.
Because, in Vault 101: no one ever enters, and no one ever leaves.