Weird playwright and author of some certified bad plays, Sebastian Sly, lives in a creepy old mansion called The Shadows. His arch enemy is the snide drama critic Sylvia Frye. She hates thrillers and her ruthless reviews have forced Sebastian into retirement. In revenge, Sebastian invites her to his home where all manner of chills and thrills are trotted out to convince her she’s wrong. A hilarious cast show up and are terrorized by the insane goings-on.