The Man Who Cleans knows you can find a lot of secrets in trash. People tend to lie but their trash never does. The Man Who Cleans thought he was invisible, until he met the Girl with the Purple Hair Lock. Girl with the Purple Hair Lock breaks into his tidy life because only an evil angel can save her now. Meanwhile, the Huntress knows somebody is killing blonds out there. Nobody believes her, but she knows. What she doesn't know, though, is that evil is hiding behind the green door. The truth lies at the bottom of a dark, deep abyss.

Dario Argento is one of the most acclaimed Italian directors in the world, revered as if he were a rock star. At the same time, however, he is a person who has always protected his private life. This documentary breaks that taboo and delves into the most intimate aspects of his life and career, uncovering personal documents and photographs that, until now, had been jealously guarded.