Summary

The prologue takes place in the year 1979. Wilma returns home from the hospital, where she was visiting her husband Carson. Wilma warns her 13-year-old granddaughter, Lala, not to venture past the village’s tunnels. Wilma tells her the story of the one-armed sister. There were once twin sisters. One was smart and one was stupid. One day, the stupid sister decided to explore the tunnels. A monster started to drag her to the other side. Others tried their hardest to get the sister away from the monster but in the end, the monster ripped her arm off. The stupid sister was left with a stump for an arm as a reminder of her failure to listen to the warnings about the tunnel.

Chapter 1 picks up five years later in 1984. A pregnant Lala leaves the house in her nightgown to search for her husband...