In 1988, Richard Conley (Joe Estevez) and Curt Wade (Rod McCary) reminisce about June Michels, the love of their lives. In flashback scenes originally filmed in 1971, June is played by Alexandra Hay and Richard is played by Martin Sheen.

Jack Farley and his family are asked to attend an experiment about social behavior for a planned space station. Therefore they move into an underground dome for three months. But then it turns out that a secret military department replaced the NASA scientists and conducts an experiment on its own...