This epic saga delves into the heart of time and reality as a malevolent force attempts to rewrite history itself. Heroes from across the cosmos must unite to combat a fractured future, fighting to save their universe from erasure. Witness temporal chaos, treacherous paradoxes, and the sacrifices required to restore the timeline's balance.
Superman created by Jerry Siegel and Joe Shuster; Superboy created by Jerry Siegel, by special arrangement with the Jerry Siegel family; Supergirl based on the characters created by Jerry Siegel and Joe Shuster.
Crisis in Time
"Everything you know about the DC Universe is about to be affected. The universe will be shaken to its very foundations... and then rebuilt. In 1985, DC Comics dramatically altered comics' original universe with Crisis on Infinite Earths - an unforgettable, defining event in comics history that streamlined DCU continuity forever. Nine years later, the heroes of the DCU found the temporal fabric of their new reality unravelling and the biggest threat since the Crisis was about to be revealed." -- Page [4] of cover.