Kei Narutani and his childhood friend, Song Minghua, are Chinese refugees who are fleeing from the Zai, a mysterious organization that indiscriminately terrorizes their country and its people. Fortunately, during their escape to Japan, they are saved by a strange red aircraft. Kei's fascination with this aircraft leads him to meet his savior: a girl who is an "Anima"—the pilot of a unique type of airplane called a "D...