Bigfoot, Adam's father, wants to use his fame for a good cause. Protecting a large wildlife reserve in Alaska sounds like the perfect opportunity! When Bigfoot mysteriously disappears without a trace, Adam and his animal friends will brave anything to find him again and save the nature reserve.

Paris, 1910. Emile, a shy movie projectionist, and Raoul, a colorful inventor, find themselves embarked on the hunt for a monster terrorizing citizens. They join forces with Lucille, the big-hearted star of the Rare Bird cabaret, an eccentric scientist and his irascible monkey to save the monster, who turns out to be an over-sized but harmless flea, from the city's ruthlessly ambitious police chief. Written by The Film Catalogue