Check your pulse at the door... if you have one.

Workaholic Jim Evers and his wife/business partner Sara get a call one night from a mansion owner, Edward Gracey, who wants to sell his house. Once the Evers family arrive at the mansion, a torrential thunderstorm of mysterious origin strands them with the brooding, eccentric Gracey, his mysterious butler, and a variety of residents both seen and unseen.