Dear Mr. Gacy

As part of his college thesis, Jason Moss (Jesse Moss), a criminology student, decides to write to John Wayne Gacy and attempt to gain his trust through impersonating a typical victim or admirer. Moss sends a carefully crafted letter to Gacy (William Forsythe) in prison, portraying himself as a vulnerable, sexually confused boy. The letter is an intricate plan to get inside Gacy's head in hopes of uncovering new information regarding his murders that will aid Moss in writing a standout term paper. The film unfolds as Gacy, suspicious at first, puts Moss through intense emotional tests via letters and collect calls, all of which leads to strained relationships with his girlfriend and family. Gacy tries to convince Moss to become a hustler, and Moss lies about having his wallet stolen by a client. After hearing that, Gacy offers to have the man's penis cut off, saying he is very protective of people he is close to. Gacy even asks Moss to convince his younger brother, Alex, to send Gacy a letter, and suggests that Moss molest the boy after hearing he gets beat up a lot. That makes Jason avoid Gacy's calls for a few days, making Gacy angry and suspicious that he is writing to another inmate. Meanwhile, Jason grows increasingly paranoid and aggressive under Gacy's influence; he inflicts a savage beating on a classmate who had been bullying his younger brother, and hires a prostitute with the intent of assaulting her, stopping himself only at the last moment. Once Gacy hears that his last appeal failed and he will be executed soon, he offers to pay for Jason to visit him in prison. Jason agrees after getting a call from the warden, who says the two will not be in the same room and there will be guards. Jason also speaks to a victim of Gacy's who escaped, who does not want him to go. After Jason arrives, he finds out he will be in the same room with Gacy and the guard leaves. Gacy shows Jason piles of letters he received from the media and admirers. Gacy gets angry when Moss refuses the strawberry shortcake Gacy ordered for him. Gacy begins threatening Jason and then sits back down and starts acting like the two are friends again. After more conversation, Gacy says he is going to rape and kill Jason, and shoves him against the wall. The guards watching the security cameras see this, but think the pair are simply kissing, and turn away because they do not want to watch them having sex. The guards finally arrive a few minutes after Jason yells for them. Gacy calls Jason again, and threatens to tell everyone that he molested his brother. Jason then tells Gacy he was just studying him for school. Gacy is executed soon afterwards and Jason speaks to the faculty at the college he attends about his relationship with Gacy. The film ends with a real-life interview with the real Jason Moss, and shows the real photo taken of Jason and Gacy several days before the execution, stating that Moss went on to graduate and write a book on his relationship with Gacy before dying by suicide in June 2006.