The Green Butchers (Danish: De grønne slagtere) is a black comedy featuring two butchers, Svend "Sweat" and Bjarne, who start their own shop to get away from their arrogant boss. Cannibalism is soon introduced to the plot, and further complications arise due to the reappearance of Bjarne's mentally retarded twin brother Eigil.

The 12-year-old Oliver discovers that his grandfather used to be a monster hunter and is keeping a shadow monster locked up in his secret cellar. When the shadow monster accidentally escapes, Oliver and his younger brother Lasse have to follow their grandfather's instructions and enlist their friends to catch the monster and bring it back - before it is too late! »Monster Busters« is based on an idea of the universe in the children's book series by Jacob Weinreich.