The speaker stepped to the podium. The audience waited expectantly. But before the celebrated scientist could utter a word, he clutched his neck, gasped and fell to the ground - the victim of a poisoned dart.

Clearly someone at the conference could handle a primitive blowpipe with deadly precision. The inquisitive Dr. Davie did some research of his own and discovered that each of the distinguished scientists had something to hide. Now he had to discover which one was venomous enough to kill in order to protect his secret.