Dr. Harry Vanderspeigle - a stranded alien explorer hiding in plain sight - has been posing as doctor and solving crimes in the small town of Patience, Washington. After Harry accidentally exposes himself to investigators who are on his trail, a mysterious arsonist and a stubborn federal agent arrive in town to heat things up! The local sheriff must decide if he'll remain loyal to his inquisitive friend Harry, and nurse Asta finally realises the danger she and Harry are both in.