Spider-Man, the X-Men, the Fantastic Four, the Avengers -- they've all caught up with Doom. But Doom has experience -- and knowledge -- from his leaping through time that they don't have. When Reed Richards appears before Doom -- possessing the body of Julius Caesar at the height of his powers -- he is unafraid. But the fight quickly spills beyond even the borders of the Roman Empire as the heroes chase Doom throughout history... with Doom always being one step ahead. The heroes are thus forced to make a desperate choice...and time will never be the same again.