Phase IV - Plot

Plot

Due to some unknown cosmic event, listed in "phases", ants have undergone rapid evolution and developed a hive mind. A scientific team begins investigating strange towers and geometrically perfect designs that ants have started building in the desert. The local human population flees the strangely acting ants. James Lesko (Murphy) and Ernest Hubbs (Davenport) set up a computerized lab in a sealed dome located in an area of significant ant activity in Arizona. The ant colony and the scientific team, along with a holdout rural family, make war against each other, with the ants being the more effective aggressors. The narrative uses the scientific team as the main protagonists, but there are also ant protagonists going about their duties in the colony. The ants immunize themselves to the humans' chemical weapons and soon infiltrate their lab. Teams of ants penetrate the computers of the lab and short them out. Kendra Eldrige, a young woman who had taken refuge with the scientists, abandons the lab.

Hubbs and Lesko begin to have different plans for dealing with the ants. While Lesko thinks he can communicate with the ants using messages written in mathematics, Hubbs plans to wipe out a hill he believes to be the ants' central hive. Delirious from an ant bite, Hubbs can barely get his boots on, but is determined to attack the hive and kill the ant queen. Instead, Hubbs literally falls into trap - a deep ditch that soon fills with ants that consume him. Helpless to save Hubbs, and concluding that the ants will soon move into desert areas where their growth will exceed man's ability to control them, Lesko chooses to follow Hubb's plan. He sets out to the hive with a canister of poison. Descending into the hive, Lesko hunts for the queen but instead finds Kendra. In the film's cryptic finale, the two embrace. Lesko realizes that far from destroying the human race, the ants' plan is to change them, making them a part of the ants' world.

Despite the lurid tone of its poster art based on one of the shocking images from the film, Phase IV approaches its subject matter naturalistically, with relatively little melodrama. The film contains relatively little dialogue, mainly relaying the storyline visually. Interestingly, the theatrical release poster was not designed by Saul Bass, even though he was a noted poster designer.