As Phantom continues to defeat Pretty Cures across the world, Megumi worries that Phantom is too powerful for her and the others to handle. Deciding to put it behind her for now, Megumi and the others help out Mao's class, including a superhero obsessed classmate named Takuma, on a trip to the beach to collect clams. As the group help Takuma search for clams, with Takuma later helping out others, they are targeted by Oresky, who summons a Clam Saiark. Spurred on by Takuma's hero spirit, the Cures overwhelm the Saiark and save the day, allowing the kids to enjoy their spoils.