Earth's fate rests in their hands. Trapped aboard the Undying's ancient spaceship and reeling from the truth they've uncovered, Mia and Jules are desperate to warn their home about what's coming.

After a perilous escape, they crash-land on Earth's surface but Jules and Mia can hardly fathom their new predicament: No one believes them. Because the threat against Earth is hiding in plain sight.

A mounting global crisis is taking shape, starting with a mysterious illness that seems to reduce its vi...