The movie follows Dr. Ryan Stone (Sandra Bullock), a medical engineer and mission specialist, and Lieutenant Matt Kowalski (George Clooney), a veteran space astronaut, as they travel to space to service the Hubble Space Telescope.
But suddenly, a detonated satellite caused a chain of explosions, cutting off their communication and putting their mission in danger.
With no means of transportation back to Earth, the two astronauts drift in space.