Devon is back with a new Cavewoman series! Doctor Lansing and his nerdy assistant Mona are researching Meriem's DNA to produce a serum that will hopefully give the citizens of Marshville a better chance to survive the dangers of a prehistoric world. Jealous of the attention that Meriem receives from an adoring Marshville and wanting her boyfriend Bruce all to herself, Mona takes a heavy dose of the prototype serum and seeks to discover if she is more than a match for Meriem. Look out! It's a rumble in the jungle and Marshville isn't big enough for both of them!