Sometime following the events of Gundam EXA, Sthesia Awar tells Leos Alloy that she has found a new GA data cluster on a computer located outside Jupiter X. The pair dive into this new data and find themselves in the Universal Century, during the attack on Side 7. However, upon entering the colony, they discover that the interior is in ruins, and the RX-78-02 Gundam has been destroyed before Amuro Ray could activate it. The two detect a faint life sign within the colony, which originates from Themis Chiron, a G-Diver from Saturn II. Chiron warns them to leave as quickly as possible, or they will be caught in the conquest of Mars I.