Phoebe Lin and Will Kendall meet during their first month at prestigious Edwards University. A grieving Phoebe, who blames herself for her mother’s recent death, is increasingly drawn into a religious group --- a secretive extremist cult --- founded by a charismatic former student who has an enigmatic past that involves North Korea and Phoebe's Korean American family. Meanwhile, Will struggles to confront the fundamentalism he's tried to escape, and the obsession consuming the one he loves. When the group bombs several buildings in the name of faith, killing five people, Phoebe disappears. Will devotes himself to finding her, seeking answers to what happened to Phoebe and if she could have been responsible for this violent act.