On their way to the Gunmen rallying point, Team Gurren decides to take a break at a hot springs getaway they find in the middle of nowhere, only to discover not everything is as it seems. 

Having temporarily stalled Viral and Thymilph in the last skirmish, the Team Gurren and their newly arrived allies join forces as "Team Dai-Gurren" and launch a decisive strike against the regrouping Gunmen force.