A year has passed since Basil's battle with Ratigan atop Big Ben, and the Flavershams have moved to the American West to put that horror behind them. However, once arriving in Green River, Olivia's father is kidnapped once again. Can Olivia hone her detective skills to find him? Luckily, she'll get a little help from one Fievel Mousekewitz, setting the two of them off on a journey that will include many old friends and foes alike.