Unction

In this icky horror story titled Unction, Brian Tucker kills and mutilates an elderly couple under instructions delivered by faceless nuns in white habits. He is a resident at the Luna Del Mar manor, a Los Angeles based board-and care-for the mentally ill. Brian does something unspeakable to the brains of these dead people. He believes the couple he's killed will return to life as zombies under his control. Unseen demonic forces have other designs.