When Nancy and her chums, Bess and George, sign up for a
bicycle tour around
Ireland they don't expect to be thrust into mystery mode. However, several of the other participants in the tour raise Nancy's suspicions: a dark character who lacks one pinky, an eager-beaver journalist, and two mysterious girls from
Australia. Nancy unravels the truth about Rhonda and Rachel but finds herself in a race against time to save them from danger. ==Adaptation ==