Strange, rhymed advertisements in the newspaper unsettle three London gangsters - and rightly so, because soon the first of them are killed. The mysterious killer also catches a shady lawyer. Higgins and Lane find out that the key to the crimes is an unsolved diamond heist.
Inspektor Higgins
Barbara Lane
Sir John
Ann Pattison
William Bolden
Peggy Lynch
Lady Upperworth
Miss Thinwhister
Stephen Scott
Ruth Bolden
Tom Averil
Mr. Nelly
Robert Frazer
Taxi driver
