Careless (2007)

Wiley Roth (Colin Hanks) a nerdy slacker who struggles mightily through life, one night finds a grotesque severed finger in his own kitchen. While at first Roth and his friends are disturbed by the sight, they decide to set out on an adventure to solve the mystery of the finger and how it made its way into their kitchen and lives. They search all over Los Angeles trying to track down the parties responsible, finally tracing the finger to a mysterious nine fingered woman named Cheryl (Rachael Blanchard) who Roth falls for. Cheryl is not all that she seems to be, and Roth is in for a major shock when he finds out whom indeed she really is.