Out of the wind and rain of a sudden storm, seeking shelter from the elements, Alfred Taylor, author and part time actor, pushes open the front door of an old mansion on the coast of Maine and finds himself mistaken for the owner of the house. What starts out as a lark soon proves otherwise, and he finds himself engaged in a battle for survival that becomes # more desperate as the night wears on. A young girl is struck down on the dimlv lighted stairwav, and a doctor, hurriedly summoned from the village, confines her to the house and leaves his nurse in charge. During the night she takes a turn for the worse and is removed to the local hospital. A routine check-up reveals that the girl never reached the hospital, and Taylor, already under suspicion as the assailant, finds himself trapped in the house and apparently the next victim! A terrifying cat and mouse game develops and Taylor, slowly but surely, is forced to the wall as he battles desperately against intangible, unknown forces. From the first audience awareness that something is happening on stage, even though the curtains have not yet parted, to the very quiet closing of the final curtain THE OBLONG CIRCLE uses a unique and original method of presentation, marking a new departure in mystery plays.