|The following is based on Fallout Shelter or Fallout Shelter Online and some details might contradict canon.|
A straightforward quest, the dwellers are sent to a randomized location in order to rescue a pet. There may be radroaches on this quest, feral ghouls, and a glowing one. The top floor always has a glowing one accompanied by four more ghouls. Upon defeat, the glowing one's corpse yields a pet carrier as a reward.