Grimm is about the fairy tales that you have heard before bedtime comes to life when Detective Nick Burhardt (David Giuntoli ) thought that moving to Portland, Oregon was a good idea. It was until he started seeing things he couldn't explain such as normal beautiful women turning into hags or a normal man turning into a troll. Nick goes to his relative in the hospital who tells him that he has the Grimm, a supernatural power that is able to see the creatures in real life. With his partner Lt. Hank Griffin (Russell Hornsby) the pair track down a killer in a "Little Red Riding Hood" tale.

Folklore collectors and con artists, Jake and Will Grimm, travel from village to village pretending to protect townsfolk from enchanted creatures and performing exorcisms. They are put to the test, however, when they encounter a real magical curse in a haunted forest with real magical beings, requiring genuine courage.

In 1811, in a French occupied Germany, the crooks Brothers Grimm pretend to fight
against evil witches and monsters to make money. However, they are arrested by
Cavaldi and General Delatombe, but they have a chance to redeem themselves in the
village of Marbaden, where ten young girls have vanished. Will and Jacob are guided
by the local Angelika through an enchanted forest where they face the evil Mirror
Queen that depends on the sacrifice of twelve girls in the eclipse to stay beautiful
and young.