The new graded readers series of original fiction, adapted fiction and factbooks especially written for teenagers. Twins, Andy and Mary, are in Dublin on a school trip. When Mary discovers that she has been given a forged _20 note, she thinks she knows the identity of the forger. The twins start to investigate, but it soon becomes clear that the forgers know who Andy and Mary are too.

This is a British English version of the title. The book comes with a CD-ROM/Audio CD with vocabulary games and complete text recordings.