Kingdom (of silly hats). A 16th Century Korean prince (in a silly hat) has to contend with political conspirators (in silly hats), who wish to place a pretender queen (in a spectacularly silly hat) on the throne and kill him. However, the prince encounters a plague that turns people into zombies (and knocks off their silly hats) and so strives to save his kingdom so that everyone can wear their silly hats in peace.
I'm not usually a fan of the zombie genre, with or without silly hats, but this is really very good indeed.