Dialogues is Land's last film: A chaotic, self-reflexive experimental narrative about many, many things-- namely Land himself. A caustic, anything-goes attitude permeates the late work.

University lecturer Neil Tannahill is drawn into a sinister conspiracy involving secretly-stored Soviet nuclear waste at a remote British nuclear facility after receiving an enigmatic note from legendary atomic scientist and one-time former head of "Doomwatch" (the infamous Scientific watchdog group of the seventies), Dr Spencer Quist.

Combining a family vacation with business, Walter Richmond takes his wife and their 10-year-old, mute daughter, Melissa , to the Netherlands -- where Melissa inadvertently witnesses a murder. Unable to tell anyone what she's seen, the frightened girl vanishes in an attempt to elude the killers. Meanwhile, her parents try desperately to piece together the puzzle leading to Melissa's disappearance.