Insidious: The Last Key

In 1953, Elise Rainier lives in Five Keys, New Mexico with her parents Audrey and Gerald and younger brother Christian. Elise and Christian encounter a ghost in their bedroom. Frightened, Christian looks for a whistle their mother gave him to call for help, but cannot find it. Gerald, furious, beats Elise and locks her in the basement. There, Elise opens a mysterious red doorway and is briefly possessed by a demon. When Audrey comes to investigate, she is killed by the demon.