Ep. 1: The 504th Wing faces a massive Neuroi nest over Venezia while Yoshika follows Mio into battle.

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Six months after the conflict in Brittania, the 504th Joint Fighter Wing encounters a powerful Neuroi nest above Venezia that destroys previous enemies and attacks relentlessly. Yoshika, having just finished middle school, receives blueprints from Amaki Suwa believed to be from her father. Upon learning that the Strike Witches are in danger from the superior Neuroi, she disregards Mio’s order to return home. Instead, Yoshika retrieves her former Striker Unit to follow Mio into combat. Impressed by Yoshika’s determination, Mio permits her to join the mission. During their flight, which lasts for a week, their aircraft encounters a Neuroi ship, escalating the immediate threat they face.