Rex (Toy Story) is on a mission for answers! Joined by Trixie and Forky, his search for the truth takes them on an unforgettable adventure filled with fun, surprises, and discovery. The mighty dinosaurs went extinct 66 million years ago...but Rex won't stand for it! Lucky for him, in his investigation into the origins and end of his kin, he can count on the support of wise Trixie and on Forky's help. Once their quest for explanations begins, the three toys will find out more than they bargained for!