Hellbender

Teenager Izzy lives in isolation with Mother because she has a rare immune disorder. Or so she is told. After befriending local girl Amber, Lizzy begins to question the reality of her disease. And when she eats a live worm as part of a teenage game, she soon develops a ravenous hunger for living things, learning that she is the latest in a line of "hellbenders", supernatural beings who possess immensely powerful abilities.