332 BC - Athens, shaken by continuous wars, has been forced to ally with Alexander the Great, who continues his campaign to conquer the East. During that turbulent period, the mysterious murder of a prominent Athenian shocks the city. When suspicions turn against the exile Philemon, young Stefanos, his closest male relative, is called upon to defend his cousin in the complex trial that will follow.

In this difficult situation, Stefanos decides to seek the help of his teacher, Aristotle. The philosopher, perceptive, scholarly, and with impeccable judgment, will guide the inexperienced but talented young man through the maze of clues to uncover the unsuspected murderer.