To soothe the public opinion, Rossiu overthrows Simon and puts him under arrest. But when the Anti-Spirals launch a large-scale attack on Kamina City, he is left with no option but to let Simon engage the enemy using the Gurren-Lagann, not before resorting to extremes to put him under his control.

Team Dai-Gurren struggles to escape from the ocean of despair created by the Anti-Spirals without success, until history repeats itself, as another irreplaceable member of the Team sacrifices himself to save the others.