Matthew Harris, an intelligent, underachieving hospital orderly, relieves the monotony of his menial job by guessing the diagnoses of inpatients. When Dr. Hennessey dies in an accident, Matthew poses as Hennessey, lands a job Hennessey had appliedMoreMatthew Harris, an intelligent, underachieving hospital orderly, relieves the monotony of his menial job by guessing the diagnoses of inpatients. When Dr. Hennessey dies in an accident, Matthew poses as Hennessey, lands a job Hennessey had applied for and starts a nerve-racking lethal charade.