Carlo's attempt to program Leonardo into becoming "one" with the Labyrinth leads him to slip into an alternate reality that could prove life-threatening.
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.
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.
