The Wault Dweller was a young inhabitant of Vault 101, a fallout shelter in the Washington D.C. area. The vault has reportedly been sealed for 200 years until the Dweller`s father opens the only door to the outside world and disappears without any explanation. The Vault Overseer believed that the Vault Dweller was involved in his father's escape, and commanded the vault's security force to arrest the Dweller. This left the him little choice but to also escape from the vault, with the hope of locating his father and finding out why he left.
Now he roams the Capitol Wasteland in search of his father.