Synopsis: After his heroic performance in the Battle of Ganimedes, Alex was hoping to be received like a hero and finally get the respect and admiration of all the officers. But the mysterious event that allows him and his friends to gain access to The Arrow and pilot it was witnessed by Captain Churé, who decides to expel him from MOTHER without a second thought. Alex is abandoned in the middle of an unpopulated place on Earth. But he cannot cry for too long, for right-a-way some men dressed in black start chasing him. Alex tries to flee but is finally captured.
At the same time, Blop, Maia, Havee and Tycho, Alex's friends, are not willing to leave their leader behind. With Mother's help, they are able to board a space shuttle and land on Earth. Here begins a funny race against time to rescue Alex from his captors. Four aliens try to pass unnoticed; and who think that our planet’s customs crazy.
In this book Alex will discover much more about his origin, of his father and of a mysterious military installation where a key secret is held in the fight against the Zarkians.