Maverick director Ulrich Seidl (DOG DAYS, the PARADISE trilogy) explores the dark underside of the human psyche with a look at basements fitted out as private domains for secrets and fetishes. No desire or proclivity is off limits to Seidl's camera, which takes in an opera-singing gunslinger, a Hitler-loving brass band, a hunter of exotic species, and the passionate devotees of S&M with an equal measure of curiosity and compassion.