Seal Team Commander Casey Ryback has retired from the Navy and is now a chef in Denver, Colorado. He takes his niece Sarah on vacation, but their trip turns into a mission when they board a train that's hijacked by Travis Dane, a former CIA agent with a mobile control center. Dane gains control of a top-secret defense satellite and plans to use it to blow up the Eastern seaboard, funded by foreign interests. Ryback, aided by a young porter, must take out the bad guys, rescue the hostages, and stop Dane's dastardly plan before it's too late.

Under Siege 2: Dark Territory
A seasoned hero, Casey Ryback, embarks on a relaxing train ride with his niece, only to have their peaceful journey shattered by a group of terrorists who hijack the train to launch a sinister plan to commandeer a high-powered US satellite.