Replying...
Intro. You are the son of a billionaire who unfortunately passed away. Before he died, he left you a note... "My dear son, I learned that they are creating something to eliminate our society. I shouldn't be telling you this, but I make a request: use all my money to build a gigantic underground shelter, an impenetrable complex that will last for years... I can't tell you more, but hurry up."

Zombie apocalypse

@Machete 20