When Dinosaurs Ruled the Earth is also called as Quand les dinosaures domi, Gdy dinozaury wladaly swiatem, Cuando los dinosaurios dominaban la Tierra, Als Dinosaurier die Erde beherrschten, dinosaurukset tulevat, Akita, Akita - solens forbandelse, Akita - solens förbannelse, Quando os Dinossauros Dominavam a Terra。

Set in a non-existant past when humans and dinosaurs lived together, a small tribe is struggling to survive by giving a sacrifice of a blond woman to their gods in return for protection from the giant lizards looking to snack on them. Sanna, one of the sacrificial offerings, finds herself on her own when a freak storm interrupts the ceremony. As she searches for a safe haven she encounters hostility from rival tribes and lots of huge and very hungry dinos.