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