John Holmes (Val Kilmer) was a legend of the porn industry and revered in circles as a stud. But in 1981, years after his successful career and star fading, Holmes was a desperate man with his own internal demons to live up to. He's estranged from his wife (Lisa Kudrow), holding onto a relationship with his teenage mistress (Kate Bosworth), and living as a junkie in search of his next fix. But one fateful night left four people dead and John as a key suspect in one of the most grisly murders in Los Angeles. Was he partly responsible for what happened at Wonderland Avenue?