The "Cell Saga" is a major storyline in the anime and manga series Dragon Ball Z. It follows the emergence of Cell, a bio-engineered villain who seeks to achieve his perfect form by absorbing other powerful fighters. The saga showcases intense battles, character development, and the introduction of new transformations, such as Super Saiyan 2. The saga culminates in the Cell Games, a tournament where Cell challenges the strongest fighters, including Goku and Gohan. This arc emphasizes themes of sacrifice, growth, and the struggle between good and evil, ultimately leading to a climactic showdown that tests the limits of the characters' abilities.