2 years after the alien invasion and occupation, the human resistance in Sydney, Australia learns about an alien operation called "Rainfall" related to a location, Pine Gap. No details are known but a team of three, including one Alien defector, sets out to learn more. The human resistance in Sydney is attacked and destroyed, along with Sydney itself. Survivors flee to a military mountain base but it too is attacked and destroyed. The recon team arrives at Pine Gap which turns out to be a US intelligence base hosting two goofy survivors despite being destroyed on the surface. "Rainfall" is an artificial asteroid of sorts hidden below the base and created by the aliens, with potential high tech capabilities. A hasty plan to destroy the asteroid is made but to no avail, the asteroid falls in the hands of attacking aliens.
On 17 September 2020, it was announced that Jason Isaacs had joined the cast of Occupation: Rainfall. On the same day, it was announced that the film was in post-production, with visual effects being worked on by artists behind Star Wars: The Last Jedi.[3][5]
