Four friends on their way to Coachella stop off in Los Angeles to tour true-crime occult sites, only to encounter a mysterious young runaway who puts them on a terrifying path to ultimate horror

When 15-year-old Alex revealed she was gay to her devout Mormon parents, they feared so deeply for her soul that they took her from their Southern California home and placed her against her will in a conversion therapy home in Utah. Trapped for eight months with strangers, Alex faced horrible punishments and beatings that were intended to cure her homosexuality. After realizing she would have to submit to their rules in order to survive, Alex was eventually allowed to attend school, where she became friends with a boy that was the president of the gay-straight alliance. He helped Alex get in touch with an attorney, who later helped orchestrate her escape.

A year after the murder of her sister Zoë, Echo is determined to uncover the truth. With Zoë's diary as her guide, Echo finds herself pulled into the darkness of her sister's secret life and she uncovers how one small decision can lead to tragic consequences.