An alien stranded on Earth is seeking refuge in the small town of Patience, in the United States, where he hides under the identity of a retired doctor. All he wants is to avoid mixing with the humans who inspire him a great distrust - an undeniable sign of advanced intelligence - until he is rescued. However, when the real doctor of the city disappears, the one who hides under the traits of "Dr. Harry" is forced to resume service and immediately finds himself immersed in a criminal investigation. At the same time, the secret services who discovered remains of the wreck of the ship crushed, begin to wonder what might become of his passenger...