Fact1: author catches Amy having affair with man named, Fact2: Shooter Upon discovers resemblance to own story Secret Window reading Shooter 's manuscript, Fact3: dog Chico killed with screwdriver and reports to Sheriff Dave Newsome, Fact4: Mort drives to house in Riverdale to find copy of magazine, Fact5: proof and Shooter agrees to meet at Mort 's cabin
Output: Mort Rainey is an author who catches his wife Amy having an affair with a man named Ted. Depressed and suffering from writers block, Mort puts off finalizing the divorce and retreats to his cabin at Tashmore Lake in upstate New York. Mort is confronted by John Shooter, who accuses him of plagiarizing his story Sowing Season. Upon reading Shooters manuscript, he discovers its resemblance to his own story Secret Window, except for the ending. The following day, Mort explains that his story was published years before Shooters was written. Shooter challenges him to provide proof and warns against involving the police. That night, Mort finds his dog Chico killed with a screwdriver and reports to Sheriff Dave Newsome. Mort drives to his house in Riverdale to find a copy of the magazine where his story was published, but leaves when he sees Amy and Ted. He contacts private investigator Ken Karsch for help. Ken agrees to travel to Tashmore Lake to watch the cabin and talk to Tom Greenleaf, a resident who might have seen Shooter talking to Mort. Shooter visits Mort at the cabin and demands Mort change the ending of Secret Window to Shooters version, where the protagonist kills his wife. Shooter then attacks and chokes Mort. Amy calls Mort, saying their house was burned down. Mort travels to Riverdale and the two are questioned by a police officer. Ken calls Mort and says Tom Greenleaf denied seeing Mort. Ken suspects Tom was threatened by Shooter. They agree to confront Shooter together and arrange a meeting with Tom at a local diner. The next morning, Mort oversleeps. Arriving at the diner, he learns that Ken and Tom didnt show up. Seeing Ted at a gas station, Mort approaches him and Ted demands Mort sign the divorce papers. The two have a confrontation and Ted breaks his own hand. Shooter calls Mort to a meeting place. When he arrives, Mort finds Ken and Tom dead inside Toms truck and faints. When he wakes up, Shooter says they were murdered with Morts screwdriver for interfering with his business. Mort has the magazine as proof and Shooter agrees to meet at Morts cabin. He leaves and Mort covers up the crime by removing his screwdriver from Toms head and running the truck into a waterfilled stone quarry. Amy calls Mort, reminiscing about a miscarriage she had suffered during their marriage in hopes that she can convince him to sign the divorce papers, but Mort refuses once again, causing her to drive to his cabin to try and convince him in person. Afterwards, Mort picks up the magazine sent by his literary agent. He finds the package already opened and the pages containing the story cut out. Back at his cabin, Mort sees Shooters hat. Mort wears the hat and begins speaking to himself, trying to make sense of the events. Mort realizes that Shooter is just a figment of his imagination; brought to life through Morts undetected dissociative identity disorder, and carried out malevolent tasks like killing Chico, Tom, Ken and burning down his house. When Amy arrives at the cabin, she finds it in disorder, with the word SHOOTER carved repeatedly on the walls. Mort appears behind her and Amy realizes that the name represents Morts desire to SHOOT HER. Mort, speaking with Shooters accent and wearing his hat, chases Amy and stabs her in the ankle. Concerned about Amys safety, Ted arrives and is ambushed by Mort, who hits him in the face with a shovel. Amy watches helplessly as Mort beheads Ted with the shovel. Mort recites the ending of Sowing Season as he kills Amy as well. Mort recovers from writers block and experiences a mood improvement. Sheriff Newsome later stops by the cabin to warn Mort that he is the prime suspect in Amy and Teds disappearances. Mort dismisses the threat and the Sheriff leaves. In Morts room there is a secret window that overlooks a secret garden. It is implied that the bodies are buried in the garden, which is now a cornfield, and the police will probably never find them. Mort is seen eating corn for dinner and the screen cuts to black.