Four months have passed since the angeloids' last battle, and so far life has continued to be normal for Tomoki and the others. However, a new, more deadly threat arrives in Sorami City and has one target set in his sights: the angeloid known as Achos. In a race against the clock, the angeloids must protect their friend and figure out how to defeat an enemy they can't see coming.

Cosmic Era 72, and the world is divided into four superpowers. Lelouch Vi Britannia is sent to investigate the rumors of the EA's new G-weapons and to find the advantage to finally end the war. ZAFT is on the move, the EA has become corrupt, Orb has buried its head in the sand and Britannia plays at the Black Prince's fingertips. The power of SEED might not be enough.

A speculative exploration of the past of Sora No Otoshimono. What was the havoc that Ikaros is said to have wrought upon the realm of Synapse? How did Daedalus come to be imprisoned? This story offers one possible scenario.