Please answer the following question: Build a movie plot around this: What was Proteus once to Sinbad? Proteus was once Sinbad's best friend/Childhood friend.
A:
Sinbad, Legend of the Seven Seas(This film is an animation, therefore the voice actors are named)Eris (1), Goddess of Discord (Michelle Pfeiffer), wishes to ruin the Twelve Cites, currently protected by the magical powers of the Book of Peace. The Book is being transported by ship to a new home, a tower in Syracuse, by Prince Proteus (2) (Joseph Fiennes) of Syracuse, only son of King Dymas (Timothy West): however he is followed and attacked by his childhood friend Sinbad (Brad Pitt) and his crew, which includes his lieutenant Kale (Dennis Haysbert), look-out Rat (Adriano Giannini), oriental twins Jin (Raman Hui) and Li (Chung Chan), and elderly Jed (Conrad Vernon) who wish to seize the Book for ransom. Eris sends a kraken-like sea-monster, Cetus (3), to attack both ships: this is defeated by Proteus and Sinbad, but Sinbad, washed overboard as the monster sinks, is met by Eris, who tries to persuade him to steal the Book for her and bring it to her realm of Tartarus (4), for a far greater reward: a tale laughed at by his crew when Sinbad tries to tell them.Proteus brings the Book safely to Syracuse. At the celebratory feast, which Sinbad and his crew gatecrash, Sinbad is confronted with Marina (Catherine Zeta-Jones), Proteus' fiancee, and his own secret love: he leaves abruptly. Eris breaks into the Book's tower, and, assuming the form of Sinbad, overpowers the guard (Chris Miller) and steals it, leaving Sinbad's knife behind. Immediate decay and disaster overwhelms Syracuse: Sinbad, arrested, is tried and condemned to death for stealing the Book, despite his tale about Eris. Proteus, however, believes Sinbad, and offers himself in Sinbad's place as a condemned prisoner so that Sinbad can rescue the book - for which he has just ten days.Sinbad, back on his ship (the Chimera (5)), has however no thought except to retire to Fiji: he knows Dymas will not allow Proteus to be executed (although when Dymas later engineers Proteus' escape, Proteus refuses). Marina however bribes her way on board ship and then bribes...