Time is the leading thread of this novel. It tells how it affects people and how people are trying to manipulate Time.
I believe that Don Delillo didn't write a novel but a long poem instead. Not modern poetry but an epos if you will or better: a play from antiquity (both limited in Space and Time). And like a Greek tragedy it has only a few characters: Richard Elster an old scientist and philosopher, Jim Finley a film maker and finally Jessica, the daughter of Richard. The main character is Time. Richard, gloomy and taciturn. Jim, idealistic and has his head in the clouds. Jessica seems to carry a secret and is a little reclusive.
At the beginning of the novel - as a sort of introduction - an unnamed person (Elster or Finley?) - talks about a video performance at The Museum of Modern Art in New-York-City. The performance is an attempt to reach unlimited Time; The movie 'Psycho' by Alfred Hitchcock is electronically slowed down to full 24 hours. So if you stare for only a short while at the video screen it's as if nothing happens. Almost infinite or unlimited Time. There are not many visitors to the room of the video-show and they stay only for a minute at the most. The mysterious person who explains to the reader the video performance and the behavior of the public, stays in the dark shadow of the room (Jessica?) and only now and then he/she walks around the room for a while.
Richard Elster and Jim Finley live in a house with a corrugated metal roof above a clapboard exterior and located at the edge of a desert. They only stay for a few weeks. Jim tells Richard that he would like to make a video-film with Richard as the only character. He doesn't have to say or do anything. This way a parallel is made between the video performance and the real life at the edge of the desert. Here too Jim Finley searches for unlimited Space and Time. But this peaceful situation can't go on for ever. Sooner or later real life will stand at your front door.
One day Jessica visits her father Richard. She stays for a few days. One day she disappears without leaving a trace (literally). No footprints in the dust, no tire tracks, nothing. She vanished into thin air. Maybe she was never there in the first place, she could be a ghost or a hallucination. When all is said and done we die. We reach the final checkpoint, Point Omega. We become matter and the curtain falls
Talking about poetry: this is the last sentence from 'Point Omega',
" Sometimes a wind comes before the rain and sends birds sailing past the window, spirit birds that ride the night, stranger than dreams."