Randolph Carter is investigating a series of bizarre murders at a Miskatonic university. The evidence heads back to a seventeenth century warlock whose experiments with quantum physics summoned a force from another dimension. Deep in the earth lies Alyda – half woman, half demon. She wants to return to the mortal plane. Able to warp space and time, she claims a new victim at every turn. With the help of an eccentric professor, Carter uses modern science and ancient rituals to fight this supernatural creature – The Unnamable.