Following a stalking incident, Livvy Fischer's life has become derailed. Having sung for audiences since she was a child, the classically trained opera soprano is now terrified to sing publicly. Stuck in a dead-end job, she musters the courage to audition for Opera San Jose. Though she starts strong, the audition is a disaster. She decides to begin with a smaller goal--she'll try singing at her church. Partly due to a mix-up, partly to her crush on the young pastor leading the outreach, Livvy joins a worship team bound for the chapel at San Quentin. When a riot breaks out, she is separated from her pastor and the rest of her church group, sheltered by a Christian inmate. Though the plan is to keep hidden and ride out the storm, Livvy becomes the obsession of a serial killer fixated on her "type." Livvy must rely upon God, find her own courage, and trust a small cadre of protectors as she flees the hunter, escapes burning buildings, and hatches schemes to get herself and the others rescued. Yet, through thirty-six hours of uncertainty and danger, the biggest surprise Livvy encounters are her feelings for her inmate rescuer.