Long ago in a distant land, I, Aku, the shape-shifting Master of Darkness, unleashed an unspeakable evil!

But a foolish samurai warrior wielding a magic sword stepped forth to oppose me.

Before the final blow was struck, I tore open a portal in time, and flung him into the future, where my evil is law!

Now the fool seeks to return to the past, and undo the future that is Aku!