Hayato is still in Nagoya, and the three drivers from outside of Kanto are completely not used to the region’s summer heat. Commander Izumi proposes a trip to the beach, and to everyone’s surprise, their families are invited too! It’s a major familiy reunion, even with some mothers we’ve never seen, such as Shinobu and Akita’s! But Akita’s overprotective mom makes life difficult for the team when the next Giant Monstrous Being shows up. Can the team defeat the latest attempt by the Agents to cooperate without letting their moms figure out that they’re risking their lives? And just what is Commander Izumi’s motivation for moving everyone to the beach?