O inspetor Ralph Anderson, da Geórgia, investiga o homicídio macabro de um rapaz de 11 anos, mas fica intrigado com o álibi irrefutável do seu suspeito.

O inspetor Jack Hoskins regressa ao trabalho depois de uma tragédia inesperada dar uma reviravolta à investigação de Ralph.

Apesar de se encontrar de licença obrigatória, Ralph continua a investigar minuciosamente as circunstâncias confusas que envolvem a noite do homicídio.

Holly investiga uma possível ligação com um sinistro caso semelhante, em Dayton, no Ohio.

Depois de regressar de uma viagem reveladora a Nova Iorque, Holly procura novas pistas em vários locais ligados ao caso Dayton. Jeannie dá por si abalada por um incidente enervante no trabalho e entrega um aviso ominoso a Ralph.

Holly presents her unusual theory about the connection between two other mysterious child murders and the Frankie Peterson case. While Ralph remains skeptical, a more receptive Yunis suggests they start looking into Claude, the last person to have contact with Terry. Jeannie’s attempt to include Glory in their group of concerned citizens backfires.

Holly makes a calculated attempt to help a volatile but conflicted Jack, while their whereabouts are tracked by Ralph and Alec. After she's confronted by town gossip on her first day back at work, Glory considers Howie's suggestion on how to secure her family's financial future.

Sensing something ominous afoot, Claude reconnects with his brother Seale in Tennessee, while Holly, Ralph, Yunis and Andy follow him in hopes of isolating the evil force and thwarting its next kill. Meanwhile, a family visiting a local cave festival narrowly avoids a dangerous encounter.

After obscuring their true purpose in town from local police, Ralph and Yunis interview witnesses from the cave festival, while Holly and Andy visit the scene. Later, the group considers its next move as Claude deals with the weight of his role.

The group finds itself in a climactic showdown in their last-ditch, desperate attempt to root out El Coco.