Strange things are going on in London. In all of London, there is only one animal capable of confronting enigmas of this scale: a hamster named Clever, a detective by trade - who consults in the basement room of the Lexington district pet shop. Clever's reputation is firmly established: she is endowed with a prodigious sense of observation and capacity for logical deduction that leave ordinary London animals tongue-tied. When things do not quite go according to plan, she knows she can count on her hotheaded little brother Bro, who is always ready to attack adversaries far bigger than himself and take huge risks. The dangers to overcome are equal to the extraordinary cases that Clever and Bro must confront. Will they triumph and resolve these enigmas which continue to baffle Scotland Yard?