Professor McMoo, Pat and Bo aren't just any old cows, they're time-travelling, super-clever Cows In Action who visit past and future, around the world to stop the evil Ter-moo-nators changing history . . .
Sent back to Victorian England, the C.I.A. are investigating a series of strange moo-ders that seem to have been committed by a ghostly cow of doom who leaves a mysterious black calling card for each of his victims. But what have the F.B.I got to do with these murders and who will be next? The time-travelling cows need to find out, quickly!