On the night of a town festival, Ethan and Maya face their childhood fear of the Night Blights when the mischievous creatures invade their home. Aided by the ostracized scientist Professor Thornbury, they uncover the Blights' connection to an ancient evil entity and use their wits and creativity to stop it from unleashing chaos during the parade, forever sealing their secret bond and leaving the town none the wiser about the true source of their miraculous rescue.