"Mobile Suit Gundam: The Origin: Advent of the Red Comet" is a prequel to the original 1979 "Mobile Suit Gundam" series, focusing on the early years of the Universal Century timeline and the rise of Char Aznable, one of the franchise's most iconic characters. The story is set against the backdrop of the growing tensions between the Earth Federation and the Principality of Zeon, a space colony seeking independence. The narrative explores the origins of the One Year War, a devastating conflict between these two factions, and delves into the personal motivations and political machinations that drive key figures.

The series begins with the assassination of Zeon Zum Deikun, the ideological leader of the space colonies, which sparks political upheaval. His children, Casval Rem Deikun (later known as Char Aznable) and Artesia Som Deikun (later known as Sayla Mass), are forced into hiding to escape the machinations of the Zabi family, who seize control of Zeon. Casval, driven by a desire for revenge against the Zabis, adopts the alias Char Aznable and begins his rise within the Zeon military. His cunning, charisma, and tactical brilliance earn him the nickname "The Red Comet," while his personal vendetta fuels his actions throughout the series.

The narrative also follows the broader political landscape, including the Zabi family's consolidation of power and their militaristic ambitions. Key figures such as Gihren Zabi, the ruthless leader of Zeon, and Degwin Zabi, the family patriarch, are explored in depth, highlighting their roles in shaping the conflict. The Earth Federation, portrayed as complacent and bureaucratic, struggles to respond to Zeon's growing threat, setting the stage for the outbreak of war.

Central to the story is the development of mobile suits, advanced humanoid weapons that revolutionize warfare. The creation of the Zaku, Zeon's first mass-produced mobile suit, and the subsequent arms race between Zeon and the Federation are pivotal to the plot. Char's mastery of mobile suit combat becomes a defining aspect of his character, as he uses his skills to further his personal and political goals.

The series also explores the moral complexities of war, with characters grappling with loyalty, betrayal, and the cost of ambition. Char's relationships, particularly with his sister Artesia and his rival Ramba Ral, add emotional depth to the narrative. The interplay between personal vendettas and larger political struggles creates a rich, layered story that sets the foundation for the events of the original "Mobile Suit Gundam" series.

"Advent of the Red Comet" serves as both a character study of Char Aznable and a detailed exploration of the events leading to the One Year War. By focusing on the origins of the conflict and the rise of its central figures, the series provides essential context for the broader "Gundam" universe while delivering a compelling and intricate narrative.