A scientist, with the help of his three robot assistants, tends a huge garden aboard a space station, created to replenish an Earth ravaged by nuclear warfare. But his superiors' decision to abandon the project prompts him to embark on a desperate course of action. Ecological sci-fi drama, starring Bruce Dern, with Cliff Potts and Ron Rifkin.

After the entire flora goes extinct, ecologist Lowell maintains a greenhouse aboard a space station for the future with his android companions. However, he rebels after being ordered to destroy the greenhouse in favor of carrying cargo, a decision that puts him at odds with everyone but his mechanical companions.