John Trent (Sam Neill), insurance fraud investigator, has just been placed in an insane asylum. Months earlier, he was hired to find bestselling horror writer Sutter Cane (Jurgen Prochnow). Cane has disappeared under mysterious circumstances, but his publishers think it might just be a stunt to drum up support for his next book, In the Mouth of Madness. The third installment of John Carpenter's "Apocalypse Trilogy" (preceded by The Thing and Prince of Darkness), In the Mouth of Madness explores reality, fiction, and the thin, horrific line that separates the two.