Due to the emotional trauma Karla suffered during the One Year War, her mind has regressed to that of an adolescent child with the Zeon Remnants now trying to take care of her in hopes of her adult mind to recover. Daryl's Acguy squadron heads to a South Seas Alliance-controlled city in Southeast Asia to retrieve a spy, but their cover is blown and they must fend off the island's mobile Suits. Meanwhile, the Spartan is confronted by a South Seas Alliance mobile suit Squadron, with Io's former commander and lover Claudia leading them.