Eliot, Kaytoo and Mimi accompany Isabelle to the town museum to see the new exhibition on prehistoric times. There, the three friends discover a robot of a prehistoric child dressed in animal skins. Eliot believes it is a real little cave boy, who has been in a frozen state for thousands of years. Eliot is going to help his new friend escape from the museum and try to bring him back to life him with the help of Mimi and Kaytoo.