In Kakushin City, Japan, Narumi Uchida was the golden girl in high school, admired by her peers for her beauty and tomboyish personality. Everything was going her way until she and four other students got into a biological accident on a school trip.Narumi soon discovered that the accident gave her the ability to turn into a dinosaur along with the other four students. While they struggle to gain control of their prehistoric predicament, the people responsible for their mishap are hunting them down. Will Narumi and her four misfits fall apart? Or will they stand together to fight and save the day as Dinosaur Heroes?