Following the death of Ludovico's wife, Leonardo is assigned a new commission but struggles to deal with his inner turmoil; after taking on board some wise words from Fr. Luca Pacioli, Leonardo seeks assistance.

Returning to Florence, an uninspired Leonardo accepts to paint the portrait that will become the Mona Lisa; after failing to repair his relationship with Caterina, Leonardo goes to Imola, where he receives much praise from his employer.