Dak, Sera and Riq might be in over their heads when they attempt to stop a Viking invasion! Hundreds of ships carrying thousands of warriors are laying siege to medieval Paris. The Parisians are holding their own, but th stalemate can only last so long. And that's bad news - especially since Dak has been captured, forced to work alongside the Vikins while Sera and Riq defend Paris from within. No matter which side wins, the kids lose!