Set in a German town, The Hunchback of the Morgue chronicles the misfortunes of Wolfgang Gotho (pronounced "go-toe," not "goth-o"), a shaggy-haired misfit who is "retarded mentally," as the English language dubbing puts it. Gotho (everyone calls him by his last name) has a crush on a terminally ill girl with a love for flowers and an affection for the man who brings them every day. A random fight with some obnoxious orderlies makes him just a minute late for the poor girl's death. Enraged by the cavalier attitude others take toward her corpse, Gotho chops an orderly's head off, disembowels another, and steals the body, storing it in an underground crypt. He still brings flowers regularly, but is chagrined to discover rats gnawing on the untreated cadaver one terrible day. After fending off their feral leaping attacks on his own person, the outraged hunchback puts the vermin to the torch.
Wolfgang Gotho (Paul Naschy) mourns a lost love, and rages at those rats who dare mock his mourning.
To love a hunchback as Rosanna Yanni does is to put oneself in harm's way, or at least in front of harm's way.
Here's an American trailer, uploaded to YouTube by bgart13.