Vincent Quay was not the sort of person who would get mixed up in anything dangerous, but something isn't right. When Quay calls for the services of Great Redmond's most famous murder detective, and then is found dead the next day, there is every reason to believe he knew he was going to be murdered. Kleptomaniac detective Felix Green and his partner Sam Alders are left struggling to understand Quay's final moments in Falling Problem.