In Syracuse, the time allotted to Sinbad has elapsed. Proteus readies himself to be beheaded, saddened by his friend's betrayal. At the last minute, however, Sinbad appears and takes his place. An enraged Eris appears suddenly and saves Sinbad by shattering the executioner's sword to pieces. She berates him for his actions. Sinbad, shocked, realizes that this was still part of her test and that he has beaten her by proving his answer to be true after all. Eris is furious but cannot go back on her word and so reluctantly gives the Book to Sinbad before vanishing.
With the Book restored to Syracuse, Sinbad and his crew leave Syracuse on another voyage, leaving Marina behind. Proteus sees that Marina has fallen deeply in love with Sinbad, so he releases her from their engagement and sends her to join Sinbad's ship.