The story begins with the founding of Macondo by José Arcadio Buendía and his wife Úrsula Iguarán, who leave their home village due to a haunting incident. Macondo starts as an isolated and almost Edenic place, occasionally visited by gypsies who bring wondrous inventions.

The novel follows the next several generations of the Buendía family, marked by recurring patterns of love, war, ambition, and, ultimately, solitude. Colonel Aureliano Buendía, one of the sons, becomes a key figure during the civil wars, while other family members grapple with passionate affairs, eccentric obsessions, and the unique magic that permeates their lives and Macondo itself.

Over the century, Macondo gradually loses its innocence and isolation as it becomes connected to the outside world, experiencing progress, political turmoil, and the exploitative arrival of a foreign banana company. This leads to a tragic massacre of striking workers, an event that is later collectively forgotten by the town.

The Buendía family, despite their intense relationships and the dramatic events surrounding them, are often characterized by a profound inability to truly connect with one another, leading to a pervasive sense of solitude. Incestuous relationships and the repetition of names across generations further contribute to a cyclical and often tragic destiny.

The novel culminates with the final descendant of the Buendías deciphering an ancient prophecy that reveals the history of the family and Macondo was predetermined and that the town and the lineage would be wiped out by a great wind. The last Buendía dies as the prophecy is read, and Macondo vanishes from the face of the earth, returning to the nothingness from which it came.

One Hundred Years of Solitude is celebrated for its magical realism, where fantastical elements are seamlessly woven into a realistic narrative, exploring themes of history, memory, the cyclical nature of time, solitude, love, and the rise and fall of families and societies.