Deadgirl (2008)

On a hot day, two rebellious high school friends, Rickie and JT, decide to skip class to hang out at an abandoned asylum for the mentally ill. After breaking into the derelict place, the fun begins in the ill-lit maze of the institution's long corridors and dark rooms, when, all of a sudden, JT discovers the body of a naked young woman covered with a plastic film. Now, in the light of this grotesque and unexpected finding, troubling questions rise, as this seemingly unresponsive prisoner starts growling and gnashing. Who is this scarred woman? Was she a patient here, or was she the guinea pig of a demented scientist? Above all, how human is this unknown girl who cannot die?