When miners blast for gold in the 1870's, they accidentally release ancient creatures known as Tommyknockers. The Town of Deer Creek, Nevada is soon under siege with only a handful of survivors held up in the local saloon.
Gyeong-ah works as a caregiver and lives alone. The only one she can rely on is her daughter, Yeon-su, but it's hard to see her after she moved out on her own. Meanwhile, Yeon-su, who is suffering from her ex-boyfriend, Sang-hyun, argues with him again and visits her mother’s house. After Yeon-su left, Gyeong-ah receives a shocking message from a stranger.
