The book follows the journey of an orphaned dinosaur named Aladar who is raised by a family of lemurs. When a meteor shower devastates their island home, Aladar and his adoptive family embark on a perilous journey to find a new safe haven. Along the way, they encounter a herd of dinosaurs struggling to survive in a harsh, changing world. As Aladar navigates the challenges of leadership and survival, he learns the importance of cooperation, courage, and hope in the face of adversity.