The story of Gaia going missing from her aunt's house just before sunset on a November evening in 2017. Just before she leaves, she makes a last-minute call to her identical twin sister, Maya, then she runs.

Zara McDermott digs deeper into the world that Gaia unwittingly stepped into after she was approached online by an older man. Zara discovers how, in 2014, when Gaia was 16, she was approached by a man five years older than her online.

Zara McDermott discovers that Gaia's alleged attacker contacted her months before she went missing. As her older sister Clara says, the texts triggered a mental health crisis. As her attempts to get a restraining order were declined, Gaia spiralled.