The unmanned Pilgrim of space probe returns from Space to Earth orbit with some space alien potentially containing evidence of alien life. An accident in the lab causes one of the alien is to set free. The crew try to fire the thrusters to blast alien away from the spacecraft, but their attempts fail. The alien attack and killed each and every one but Dr.Mike. Finding their communication with Earth cut off due to overheating of the communication systems. Dr.Mike proposes returning the ship to back earth but he discovers that alien creature has destroyed spaceship system. Dr.Mike performs a walk to find and fix the problem and he is the only one survival but he needs to be very careful because the alien monster is also lurking in spaceship. He will hide from alien and fix spaceship system so that he can go back to earth