Hero, Oracle and Daedalus are kidnapped by ruthless Minoans and brought before King Minos and his sadistic daughter Ariadne, who subjects the trio to vicious torture. Meanwhile, the situation in Athens grows more dire, compelling Medea to arrange for a mercenary to pull off a rescue mission.

Medea and Aegeus work to persuade Hero to solve the riddle of the Lexicon in hopes that he'll use his power to save Athens. However, Hero's skeptical of their true intentions and unsure of the course of action he should take.