Prisoners is that after two young girls go missing, their distraught father, Keller Dover, takes matters into his own hands when the police are forced to release the only suspect due to a lack of evidence. He believes the police are not doing enough and begins his own investigation, while the lead detective, Loki, continues to search through official channels. The story explores how far a parent will go to protect their family and features a dramatic thriller plot with layered storytelling.