Macross Δ

In Shahal City on the planet Al Shahal, Hayate Immelman discovers a stowaway named Freyja Wion in the shipping docks. Freyja stowed away to run away from an arranged marriage and to audition for the idol group Walküre on the planet Ragna, but Hayate informs her that she is on the wrong planet. When a Vár outbreak suddenly causes Zentradi soldiers to go rogue and attack the city, Walküre and Delta Flight scramble to contain the threat, but are later on met by the Aerial Knights in a fierce dogfight. During the battle, Freyja sings along with Walküre and assists with suppressing the Vár while Hayate commandeers an abandoned Valkyrie and uses it to protect Freyja.

Having arrived on planet Ragna with Hayate, Freyja marvels the Ragna City and the base of the Delta Flight. To her dismay she is first denied entry into the audition, but shortly afterwards she receives a "special permission" to do so. Meanwhile, Hayate is recruited by Delta Flight, who had witnessed his skills in the previous battle. Hayate is hesitant at first since he doesn't like fighting and doesn't like following orders, but eventually agrees so that he can have the chance to fly again. Freyja is told that she failed her audition, and on the train ride back to the city, one of the passengers contracts the Vár infection. Freyja immediately uses her song to calm the infected passenger, and it is revealed that the entire event was a ruse set up by Walküre as part of her final test. Having passed, Freyja becomes an official member of Walküre.

Hayate becomes a cadet in Delta Flight under Mirage's wing and learns the basics of Valkyrie piloting the hard way. After weeks of slacking off training, he is issued a challenge by Mirage in a mock battle, where he must score a hit on Mirage before the time limit or he will be expelled from the unit. Meanwhile, Freyja is also struggling in her practices with Walküre, unable to find the proper motivation to sing. In order to encourage her, the Walküre members show footage of Hayate's mock battle with Mirage. Upon seeing Hayate struggling against her superior piloting, Freyja begins to sing with purpose, which seemingly also gives Hayate the motivation he needs to finally score a hit on Mirage. Mirage is shocked at how Hayate was able to beat her, but Hayate, having been impressed with Mirage's flying skills, promises to start attending her training sessions from now on.

On the planet Randall, the time comes to Freyja's first concert as a member of Walküre, as well as Hayate's first sortie as a member of Delta Flight. Everything runs well until the Aerial Knights strike again, while at the same time causing a mass Vár outbreak. Mikumo and Freyja begin singing in unison to stop the outbreak, and the other Walküre observe how Freyja's song seems to amplify Mikumo's, managing to suppress the Vár outbreak on their own. Meanwhile, the Aerial Knights reveal that while they have been distracting Walküre and Delta Flight, they had successfully seized the planet Voldor with their army and announce a declaration of war from the Kingdom of Wind to the New Unified Government.

Following the Windermere Kingdom's declaration of war on the New United Government, Delta Flight and Walküre are given new orders to defend Ragna from upcoming attacks. When rumors of Freyja being a Windermerean spy surface, she and Hayate take a joyride in his Siegfried unit to clear their heads.

The Aether is sortied to counter another Vár Syndrome infection on a New U.N. Spacy squadron, but tensions arise when Mirage is outnumbered in a dogfight and the Aerial Knights come close to killing Walküre, and Hayate is forced to stain his hands with blood for the first time in order to protect her.