Due to the line of Kree Sentries - alien robots that have been observing the Fantastic Four - having been destroyed, Johnny is put on trial by Ronan the Accuser against the Kree Empire. Ben and Susan are set to defend him, and Reed is chosen as his lawyer. However, since Johnny is already presumed guilty before the trial starts, it's not going to be easy.

The Four have a contest called "Fantastic Fifth for a Day." But when the Skrulls return with the Super Skrull, it may be up to nerdy teen Rupert, the Fantastic Fifth, to save the day.

The Grandmaster forces the Fantastic Four to battle Ronan the Accuser, Impossible Man, Annihilus, and Super Skrull. The fate of humanity depends on the winners of this mighty contest.