As Daigorg aims to steal the ultimate power, which was hidden inside Caucasus Kabuto Castle to destroy Shugoddam, Gira, believing the current situation will be his final test, must take a risk to protect his people and strengthen his bond with the Shugods.

Several days after Ohsama Sentai's venture at the Land of Dead, Hākabāka, an unexpected heat wave suddenly blasts over Tikyu. As a result, the monarchs decide to hold a summer festival at Shugoddam, where they also participate. While Jeramie and Geroujim confronts Desnarak at Bugnarak's base to confirm the latter's connection with the heat wave brought upon Tikyu.