|The following is based on Fallout Shelter or Fallout Shelter Online and some details might contradict canon.|
This quest takes place in a building with four floors and contains raiders and mole rats. The second room contains four mole rats. The rightmost room has three raiders. The second floor has three raiders in the rightmost room and three more raiders in the room to the left. The leftmost room is inaccessible from this floor. On the third floor, in the rightmost room, there are four mole rats. The room left of that has four more mole rats. To the left of that room is the room with the raider boss, who is accompanied by four more raiders. The raider leader may drop a rare weapon from his corpse.
The leftmost room of the floor has the kidnapped bride, a random female rare dweller who will join your vault. The room she is in also contains a random rare outfit. From here, to the left, the elevator goes down to the leftmost room of the second floor, which contains three raiders. It also goes up to the top floor. The top floor has three groups of three raiders in the first three rooms from the left, and three mole rats in the rightmost room.
Behind the scenes
This quest is a reference to the term shotgun wedding though their wedding isn't because of the actual meaning.