In this double-length special, it is time for the Five Year Creator Reunion Picnic, where imaginary friends’ creators come to Foster’s to see their former friends. One friend’s creator, however, is missing: Wilt’s. Wilt, believing that his creator is still mad at him for a past let-down, sets off on a cross-country journey to set things straight. Meanwhile, Mac, Bloo, and Frankie, along with Eduardo and his creator Officer Nina Valerosa and Coco and the two scientists who discovered her, set out to find Wilt and bring him back home.