Himekawa is a guilt-stricken by her failure to protect the citizens as they boarded the Tokyo megafloat.  When a mysterious radio signal is picked up by Atraxia, she leaps at the change to perhaps finally save a civilian.  But when Amaterasu arrives at the source of the signal, they find an enemy from another world, and one deeply connected to Himekawa's past.
From your perspective,
I'm from another dimension.
Für euch bin ich wohl jemand
aus der anderen Welt.
Desde su perspectiva,
soy de otra dimensión.
Desde vuestra perspectiva,
soy de otra dimensión.
Pour vous, je suis une habitante
de l’autre monde.
Dal vostro punto di vista,
Da sua perspectiva, sou de outra dimensão.