A United States Navy destroyer escort participates in a Navy "invisibility" experiment that inadvertently sends two sailors 40 years into the future.
In 1943, the United States tests an anti-radar system to make the U.S. Navy ships invisible to the enemy. Dr. James Longstreet uses his experiment in the destroyer escort USS Eldridge that disappears from Philadelphia. The sailors David Herdeg and his best friend Jim Parker are projected to 1984, where they meet Allison Hayes. They unsuccessfully try to contact their base and out of the blue Jimmy disappears in a hospital. Allison helps David to visit Jimmy's wife Pamela, but Jimmy refuses to see him. Now David's only hope is meeting Dr. James Longstreet to learn what to do. Will he be well succeeded?