Vault 13 Overseer: Ah! Your here good. We have a problem. A BIG one. The water purification chip has given up the ghost! We can't make another one. And the process is to complicated for a workaround. Simply put, we are running out of drinking water. Our best hope is a possible replacement part in Vault 15. Reveals that it is due East of Vault 15 above ground We need you to go get us a new water chip. Frankly, I think your the only hope we have. Just be safe, ok? You prepare for departure