When a baby is abandoned outside Arden House it provokes typically different reactions in the household. For Janet the poor wee mite is an unexpected guest; for Dr. Cameron it is something of a nuisance and for Dr. Finlay it is a problem demanding a solution.

On a fishing expedition Dr. Finlay makes an unusual 'catch' when he attends to a stranger hurt in a fall. His patient is Anthony Hay, a well-known London actor staying in Tannochbrae to rest, so he says. But there is something about him that arouses Finlay's suspicions. And why is Hay's wife so anxious to keep him away from doctors?