Leonardo and his allies are forced to retreat when the Ottoman Empire storms the city of Otranto.

Leo devises an escape from Otranto but may not be able to save those closest to him.

Leo's investigation of a grisly cuddle poses a threat to the Labyrinth.

Carlo attempts to program Leo to become one with the Labyrinth; Leo's escape into an alternate reality threatens both his mind and his life.

Leo's paranoia isolates him from his friends; Lucrezia searches for a way to make amends for past sins.

The Monster of Italy is finally captured, but the upcoming Crusade Festival is still threatened by danger.

A former nemesis returns to Florence and stands in opposition to Crusade efforts; Vanessa and Nico ponder their futures; Leo attempts to decipher the Turkish armor.

Nico and Zo turn to an old enemy to gain support for the Crusade; Leo is ambushed by the Labyrinth.

Leo and Sophia struggle to control the mysterious device they've built. Back in Florence, Riario awaits judgment while Lorenzo and Vanessa take their partnership to the next level.

Leo must put his faith in his friends and in himself to have a chance to defeat the Turks.