In this film, Humbert is on the trail of his own history. Wolfsgrub is the name of the house where Humbert's mother lives, and though she is getting on in years, she becomes young again as she answers her son's questions.
The true story of a pair of college students who attempted a double suicide to end their doomed romance becomes fare for legendary pinku-eiga director Hisayasu Sato in this feature.
Writes Viola: "Sodium Vapor was recorded over a period of several weeks in the hours between one and five in the morning on the streets of an industrial area in lower Manhattan.