For Marivel Jiménez, life in her big family is full of chaos. Feeling overlooked by her parents and overshadowed by her eight siblings is frustrating, especially considering that the only one who pays attention to her is her annoying, mischievous three-year-old sister, Susana.

In a hidden kingdom where dinosaurs roam freely, Carthus is trapped. The thirteen-year-old orphan guards a stegosaurus herd for an uncaring relative, and trusts only himself.

Rosco has never thought about the fourth dimension before.

But when he meets Tess, their friendship introduces him to possibilities that only a higher-dimensional creature could make happen.