We are not alone.
An alien race has left its home due to it's galaxy colliding with another. Fortunate for them, a wormhole was constructed, that lead to the Zeta Reticuli system, only 39 light years away from Earth. It's taken them around a hundred years to get to our home, and they want to terraform it into they're own paradise.
2071 is a big year for Earth, the population has reached 10 billion, the first ever manned mission to Jupiter commenced, and now, humanity has discovered that we are not alone in the universe.
These extraterrestrials are over 1000 years more advanced than humans. We have already experienced their solar and antimatter powered technology, that makes them unstoppable.
Why did these aliens choose to come to Earth? Why are they destroying the planet? What did the audio message mean? There are many questions that just can't be answered.
We don't know who's coming, but we do know that they're coming.