Plot: In a future Earth barren of all flora and fauna, the planet's ecosystems exist only in large pods attached to spacecraft. When word comes in that the pods are to be jettisoned into space and destroyed, most of the crew of the Valley Forge rejoice at the prospect of going home. Not so for botanist Freeman Lowell, who loves the forest and its creatures. He kills his colleagues taking the ship deep into space. Alone on the craft with his only companions being three small robots, Lowell revels in joys of nature. When colleagues appear to "rescue" him, he realizes he has only one option available to him.
Alternative Plot: After the end of all botanical life on Earth, ecologist Freeman Lowell (Bruce Dern) maintains a greenhouse on a space station in order to preserve various plants for future generations. Assisted by three robots and a small human crew, Lowell rebels when he is ordered to destroy the greenhouse in favor of carrying cargo, a decision that puts him at odds with everyone but his mechanical companions. Lowell and his robots are forced to do anything necessary to keep their invaluable greenery alive.
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