Duckula, Igor, and nanny go for a ride on a roller coaster run by a Mr. Fexactely. The coaster takes them on a strange trip through time.

While looking for the castle, which has transported to the Antarctic, Duckula, Nanny, and Igor are trapped on an ice flow by mutinous penguins. There, they must deal not only with looking for the castle, but with the Vikings that are stuck there with them.

Duckula decides he wants to become a famous detective, like Sherlock Holmes, so he, Nanny, and Igor travel to London.