Event Year: 2014

A new threat appears in the form of Gauna 550, which has ejected countless lesser gauna cores on an intercept trajectory with Sidonia.

Having disposed of the opposition, Kobayashi sets Sidonia's course to the ninth planet in the nearby Lem System. All-out war now seems unavoidable.

Nagate and his team fight a hard battle against Gauna 549, aided by the appearance of a new type of gauna calling itself Tsumugi Shiraui.

Nagate and his team fight a hard battle against Gauna 549, aided by the appearance of a new type of gauna calling itself Tsumugi Shiraui.