A tough-minded military man, Colonel Jack O'Neil heads a top secret team investigating a mysterious artifact unearthed at Giza, Egypt. Daniel Jackson is a brilliant Egyptologist whose scientific curiosity clashes with O'Neil's secret agenda. But it is Jackson who identifies the object as a StarGate -- a portal to another world. O'Neil leads Jackson and a reconnaissance team through the StarGate, which transports them millions of light years from Earth where they are stranded on a strange and alien planet. When the enigmatic ruler of this extraordinary world, Ra, discovers that the doorway to Earth can be reopened, he devises a deadly plot. Racing against time, O'Neil and Jackson must overcome Ra if they are to save Earth and find a way back home.