Edmond is sailing in French waters along with his best friend Fernand, when their captain falls ill. They stop for help at a nearby island, which happens to be where Napolean Bonaparte is in hiding. Bonaparte pulls aside Edmond and asks him to deliver an innocent letter to an old friend in Marseille, France.Edmond agrees, as that is the price for the use of Napolean's physician. The captain unfortunately dies, so the crew returns home to Marseille. Edmond is made captain for his bravery in seeking a physician, and the first mate comes to despise him for it.
Fernand finds out about the letter, and reads it while Edmond is sleeping, and is angry that Edmond did not tell him about it. Edmond, not knowing that Fernand knows about the letter, rushes to greet his fiance, Mercedes, and tell her that they can now be married as he was just promoted to captain. This is also the point in the movie when you realize that Fernand is in love wiht Mercedes, but she loves Edmond.
Fernand, still angry, decides to work together with the furious first mate, and get Edmond arrested for treason, which he didn't commit. Fernand works also with a very important magistrate, Villefort, who's father is the man Edmond was to deliver the letter to. (Villefort does not know of this). Thus, Edmond is arrested, and thrown into a remote island prison by the name of Chateau D'if. There, he meets Priest, who teaches him many valuable lessons about life, how to sword fight, and give Edmond a proper education. All this is in turn for Edmond helping to dig, in order to escape the prison.
For 13 years, Edmond is held captive in the Chateau D'if, and unknown to Edmond, a letter was sent to his family and Mercedes saying that he was executed on grounds of treason. Finally, Edmond escapes when the priest dies, and becomes part of a crew on a merchant vessel, along with his good riend Jaccapo. After 3 months, Edmond is released along with Jaccapo, and they go in search