The Deucalion has collided with Count Saazbaum's Landing Castle. Inaho, Yuki and Inko must now escort Princess Asseylum to the Aldnoah Drive. Meanwhile Slaine is rushing back to the Landing Castle and Count Saazbaum is still out there in the Dioscuria.

Count Saazbaum's Landing Castle descends down to Earth and begins an assault on the United Earth HQ. The Deucalion is under direct attack from Martian forces and Princess Asseylum must make her way to the ship.

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Slaine wakes up in the Landing Castle of Count Saazbaum and learns the true intentions of the Count. Rayet and Lt. Marito must deal with with their individual memories of those they have lost to the Martians.

Princess Asseylum reveals herself to the Earth forces and Slaine remembers the time he spent with the Princess whilst being tortured by Count Cruhteo.

Lord Saazbaum decides to hold back on chasing Slaine, and instead tracks as he flees to Earth. Meanwhile Inaho and friends have arrived at Tanegashima, a mysterious location.

The Emperor of Mars broadcasts an offcial declaration of war against Earth. Inaho and his friends are drafted into the military and Slaine is on the run.

The Emperor of Mars calls for a cease fire. Inaho and friends take the moment to rest aboard an Earth Navy Ship. Slaine tries to find a way to reveal the conspiracy of the Martian Forces true intentions.

The Martians bombard the Earth with meteor attacks. Inaho and friends continue to travel with a Terran military squad when they are attacked by another Martian Kataphrakt.

The Earth Forces are in full retreat after the devastating attack from the Martian Kataphrakts. Inaho and his friends are hunkered down in a local school, preparing a counter attack.

Martian forces have commenced their attack on the Earth. The Earth's forces stand united, ready to defend against the attack as cities quickly turn into war zones. Inaho and his classmates must struggle to survive as they find themselves being thrown into danger.

Princess Asseylum wants to see Earth for the first time and plans a goodwill visit. However, Count Cruhteo doesn't seem to be sharing the same feelings about Earth. Does this mean that there will not be peace between Earth and Mars?