After being involuntarily discharged from the U.S. Special Forces, James Harper decides to support his family by joining a private contracting organization alongside his best friend and under the command of a fellow veteran. Overseas on a covert mission, Harper must evade those trying to kill him while making his way back home.

While flying a routine reconnaissance mission over Bosnia, fighter pilot Lt. Chris Burnett photographs something he wasn't supposed to see and gets shot down behind enemy lines, where he must outrun an army led by a ruthless Serbian general. With time running out and a deadly tracker on his trail, Burnett's commanding officer, Admiral Reigart, decides to risk his career and launch a renegade rescue mission to save his life.

In response to political pressure from Senator Lillian DeHaven, the U.S. Navy begins a program that would allow for the eventual integration of women into its combat services. The program begins with a single trial candidate, Lieutenant Jordan O'Neil, who is chosen specifically for her femininity. O'Neil enters the grueling Navy SEAL training program under the command of Master Chief John James Urgayle, who unfairly pushes O'Neil until her determination wins his respect.

After a deep space exploration vessel discovers a potentially habitable planet, a scouting team composed of human and biorobotic individuals is dispatched to investigate the planet's resources. Once on the ground, their reconnaissance mission soon turns into a battle for survival against the planet's hostile alien lifeforms.