Its time for the Five Year Creator Reunion Picnic, where imaginary friends creators come to Fosters to see their imaginary friends. However, once again, Wilts creator doesnt show up. So he sets off on a cross-country journey to find his creator. But soon Mac and the gang find out that Wilt had gone missing and set out on a road trip to find him. But Bloos ridiculous theories of to Wilts disappearance leads to many twists and turns in the journey to find Wilt. Will Wilt ever find out why his creator doesnt show up? Will Mac and the gang find Wilt? Will the lot make it out in one piece?