Will Green (Matt Damon) and Jack Green (Heath Ledger) are a pair of idle scammers who make a living by fraud. They often hire people to play monsters and demons in different places to cause extensive damage, and then appear as exorcists to "eliminate" monsters in order to defraud the villagers of their rewards. Because of this method, the Grimm brothers' reputation as exorcists has become more and more famous, and they were even summoned by the King of France to invite them to the cursed forest to uncover the mystery of the missing girl. Now, the Grimm brothers had to bite the bullet and go to the magic forest. In the forest, Cinderella, Little Red Riding Hood and other characters in fairy tales all appeared... In the end, they found out that it was because the female demon Queen Mirror (Monica Bellucci) had to kill young women in order to maintain her youth and use their flesh and blood to restore her youth. So, the century-long battle between the Grimm brothers and the female demon began... Can they get a fairy-tale ending?