In a future where Saturn’s moon Titan serves as a detention center for Earth’s most dangerous offenders, prisoners await their return to face trial and execution. Among them is Python Diamond, who is being transported back to Earth under the watch of five military police officers. However, upon their arrival, they discover that a devastating nuclear conflict has left the planet nearly barren. As they search for any remaining survivors and clues about the catastrophe, they stumble upon a bunker where scientists, humanity’s last hope, are hiding. Unfortunately, their spacecraft’s arrival attracts a gang scavenging the desolate landscape for sustenance and supplies, inadvertently leading them to the concealed, well-stocked refuge. The gang launches an assault on the bunker, resulting in a fierce and deadly confrontation with casualties on both sides.