John Putnam, Richard Carlson, an author and amateur astronomer, teams up with his schoolteacher partner, Barbara Rush Ellen Fields, to investigate a bright object that crashes near Sand Rock, Arizona. They rush to the scene after awakening a neighbor, Frank Daylon, Joe Sawyer, who owns a helicopter, and together the trio flies out to the crash site. Putnam climbs down into the crater and discovers a partially buried round hull. He quickly realizes this isn’t a meteorite at all but a large alien spaceship. The hatchway’s six-sided mechanism clanks closed with a distinctive sound, setting off a landslide that seals the craft beneath rubble.
Back in town, Sheriff Warren, a practical and skeptical lawman, Charles Drake Warren, along with the local press, scoffs at Putnam’s extraordinary tale. Ellen, though uncertain about what she witnessed, chooses to stand by him, sensing there is more to the story than the unsteady explanations offered by the townsfolk. As days pass, strange events mount: people vanish, only to return altered—distant, unsettled, or not quite themselves. The inexplicable disappearances and odd behavior raise the odds in favor of Putnam’s theory, and Warren grows convinced that the meteorite was really a crash-landing from an alien vessel. He gathers a posse to confront whatever may be lurking at the buried site, while Putnam yearns for a peaceful resolution and a chance to understand the invaders rather than destroy them.
Driven by curiosity and caution, Putnam ventures into a nearby abandoned mine, hoping to uncover a pathway that connects to the buried craft. There, he finally comes face to face with the ship and its occupants. The alien leader reveals a blunt truth: their crash on Earth was accidental. The beings themselves are large, single-eyed, jellyfish-like creatures that glide across the ground, leaving a brief shimmering trail in their wake. They possess the remarkable ability to shape-shift into human forms, allowing them to move among Sand Rock’s residents unnoticed as they gather the vital materials needed to repair their damaged ship. Yet their impersonations miss the exact personalities of the people they copy, sowing suspicion among the townsfolk and even causing the deaths of two of the aliens.
With their presence now exposed, the aliens decide to destroy themselves along with their ship. Putnam, however, appeals to the alien leader to reconsider and to continue the repairs while he offers a gesture of trust: he escorts the captives outside to the sheriff so they can be protected. To buy the necessary time for completion, Putnam seals off the mine, creating a temporary haven for the aliens to finish the work without immediate pursuit.
Eventually the spaceship lifts off and leaves Earth, signaling a fragile victory for those who sought to understand rather than annihilate. In the quiet aftermath, Ellen asks Putnam whether they have seen the last of the visitors. He answers with a tempered hope, reflecting the uncertainty of first contact: > No, just for now. It wasn't the right time for us to meet. But there will be other nights, other stars for us to watch. They'll be back.
