Mars has been terraformed and settled by a billion people, but it’s clear mankind needs more space to expand.
Alexander Stoneheart and Rutherford Engineering figured out how to convert Jupiter into a minor star, warming its moons and making them suitable for terraforming. Part of the process involved shifting Jupiter’s moons to a different orbit.
This created new conflicts between earth’s government and Rutherford Engineering.
Earth’s government interfered with the process at a crucial moment and a loose moon may be headed toward earth.