The settlement will be attacked by 3 waves of undead. You will receive help from militia men. The less militia men die, the more will join you against the next undead wave.
40% chance: Undead are already at the walls and you have to get past them first.
30% chance: There will be an additional wave consisting of nachzehrers食尸鬼.
Completing this contract removes the besieged遭到围城 settlement situation.