The worlds of Sherlock Holmes and Wind in the Willows collide in this adventurous mystery. One day a mole ventures from his hole and discovers the tranquil life of the riverbank. Soon, however, he finds himself and his new acquaintance, a rat, plunged into a world of murder and intrigue. It's up to these two newfound friends to discover the culprit of a double-murder before an innocent animal pays a bloody price. And what's worse, one of their friends may be the guilty party.