After a large polar bear known as Big Bear kills one of Brian Ladoon's dogs right in town, the community is on edge. Everyone wants this bear found before another victim is claimed. Conservation is on high alert while Dennis and Andrew use night-vision cameras to look for the elusive bear; if they can identify Big Bear's path into town, it could help in catching him and keeping both the bear and the community safe. While locals try to avoid the bears, Kelsey and his crew have found a way to get closer to them – in a rundown cabin on the shores of Button Bay. After a sudden storm means an overnight stay for the group, the dilapidated shack is the only thing between them and waves of migrating polar bears.