After being sent by the overseer of his vault to search for a new water purifying chip, the player discovers the horrors of post apocalyptic America, and the threat of the Master's Army.After being sent by the overseer of his vault to search for a new water purifying chip, the player discovers the horrors of post apocalyptic America, and the threat of the Master's Army.After being sent by the overseer of his vault to search for a new water purifying chip, the player discovers the horrors of post apocalyptic America, and the threat of the Master's Army.