"Appleseed" is a science fiction anime series set in a post-apocalyptic world where humanity has rebuilt society in the utopian city of Olympus. The story revolves around Deunan Knute, a skilled soldier, and her partner Briareos Hecatonchires, a cyborg, who are recruited into the ESWAT (Extra Special Weapons and Tactics) team to maintain peace and order in Olympus. The city is governed by an advanced artificial intelligence system called Gaia, which works alongside human administrators to ensure harmony. However, tensions arise between humans, cyborgs, and bioroids—genetically engineered beings designed to lack strong emotions—threatening the fragile balance of society.

Deunan and Briareos navigate complex political and social dynamics as they uncover a conspiracy involving rogue elements within Olympus. The narrative explores themes of identity, humanity, and the ethical implications of artificial intelligence and genetic engineering. Key characters include Hitomi, a bioroid and administrator who plays a pivotal role in maintaining Gaia’s operations, and Nyx, a mysterious figure with ties to Deunan’s past. The series delves into the moral dilemmas faced by its characters, particularly as they confront the consequences of technological advancements and the blurred lines between human and machine.

The plot is driven by action-packed sequences, strategic battles, and moments of introspection as the protagonists grapple with their roles in a society striving for perfection. The series balances its futuristic setting with emotional depth, examining the resilience of human connections in a world increasingly dominated by technology. Through its exploration of conflict, cooperation, and the search for meaning, "Appleseed" presents a thought-provoking narrative that remains grounded in its characters’ struggles and aspirations.