Watch Fmovies. Adaptated from the cult graphic novel, Rottentail is the story of geeky fertility researcher Peter Cotton who, when bitten by a mutant rabbit, transforms into a vengeance-seeking half-man/half-bunny. What's a boy to do? Why, take a hippity, hoppity trip home of course! Peter begins a bloody killing spree of revenge that culminates in his childhood hometown of Easter Falls.