Is it just a case of summertime blues or a full-blown career crisis? Newspaper reporter Jim Qwilleran isn't sure, but he's hoping a few days in the country will help him sort out his life. With cats Koko and Yum Yum for company, he heads for a cabin owned by a longtime family friend named Aunt Fanny.

But from the moment he arrives, things turn strange. Eerie footsteps cross the roof at midnight. The townsfolk become oddly secretive. And then, while fishing, Qwilleran hooks on to a murder mystery. Soon Qwilleran enters into a game of cat and mouse with the killer, while Koko develops a sudden and uncanny fondness for classical music...