Once there was a lighthouse keeper called Mr. Grinling. At night time he lived in a small white cottage perched high on the cliffs, and in the daytime he rowed out to his lighthouse to clean and polish the light ... When Hamish, the lighthouse keeper's cat, hears that Mr and Mrs Grinling are going to put him on a diet, he decides to find somewhere else to live. Soon, though, Hamish realises that there's no place like home.