Mama Rex and T are two dinosaurs living in the city. T, a young dinosaur, is just like any other kid -- he stays up late, he messes up his room, he gets in trouble, and he loves his mom. And Mama Rex is just like any other single working mom -- she drinks lots of coffee, she's always running late, and she loves T more than anything else in the whole world. T's friend Walter is coming over, and T is ready for a day of fun! But this play date doesn't turn out the way T expected. Walter gets too rambunctious -- and T just gets fed up. Can Mama Rex fix the most horrible play date in history?