Serija spremlja zgodbe pogumnih letalcev 100. bombniške skupine ameriških zračnih sil, znanih kot "Bloody Hundredth". S svojimi preleti in spopadih za sovražnimi črtami so močno vplivali na potek in razplet 2. svetovne vojne ter bili na koncu med glavnimi akterji za poraz tretjega rajha.

When the Pillars suddenly appear on Earth, threatening all life, it's only the act of the god Odin that offers humanity salvation. Providing a means of fighting back, he gives Earth the Valkyries, young female pilots with supernatural powers and spirit fighter planes. These skilled troublemakers, all young, risk their lives in a long-running war—but the final battle is fast approaching!