Officer Bertram has already led his men to leave the Capital and head towards the Wood Dynasty's Les County. On the way, Verna clenched her chubby little fists and solemnly told her elder brother, "I told you, that woman wouldn't live long."
Not only did she not live long, but she was also killed by her elder brother...
Before Owen Bertram left, he personally set up an array in the backyard, covering the entire area. The mouse hole under the backyard happened to connect to several extinction domains in the surrounding areas of the Capital through an underground river.
The original owner of the house, the absurd convict, was a spy from the North Wasteland Clan. The mouse hole was originally intended as a part of their plan, but Officer Bertram concluded that neither the convict nor the North Wasteland Clan had anticipated its connection to the Extinction Domain.