Elise visits her estranged mother in the hospital. She recounts the time between 1979 and 1984 — years that would change and shape her life forever. Her father’s devastating glioblastoma diagnosis, the turmoil it brought to their family, and a series of serial killings that shook their small town. Everything building toward a final breaking point, reminiscent of an explosion — or, metaphorically, the eruption of Mount Saint Helens.