On their drive to Delaware, Addison never imagined their family trip would turn into an unforgettable adventure. Everything changed when they met Daisy Dixon, a dainty girl with dangling curls, wearing dandelion-colored shoes, who had a knack for surprises. When Addison and Albert learned about Daisy's disability, they suddenly became unsure of how to act around her. When they discovered that they could just be themselves, the rest was easy, and they soon became good friends.   

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Their visit took an exciting turn when they stumbled upon a hidden clue about a legendary beast called the Delaware Swamp Monster! With their detective skills in full force, they devised a daring plan to create a monster of their own. They soon discovered that where there are monsters, mayhem develops, but the unexpected chaos made Daisy’s birthday party the most talked-about event in Delaware!