Pink Molliver is upset. A family history report is due for both school and church that conflicts with an adventure with his rancher dad to chase and lasso Desert Blaze, king of mustangs. Pink, feeling guilty, goes for the wild-horse chase. But he worries. Then, on the range, an old owl tells him how to approach Desert Blaze, a magical mustang capable of flying into space. Astride Desert Blaze, Pink, his sister Molly, and Shep, their dog, sail off into space to the Planet of All-Family Histories, where Pink may yet get his report. But fierce, sharp-toothed, fire-spitting lizards stand in the way. They threaten not only his report but any of them ever getting back.