Following a childhood tragedy, Dewey Cox follows a long and winding road to music stardom. Dewey perseveres through changing musical styles, an addiction to nearly every drug known and bouts of uncontrollable rage.

Jack Carlisle is a disillusioned 13-year old boy. His mother is always away at work since his father left. He decides to run away, as his mom won't miss him. As he is ready to leave, his nanny, convinces him to read this 'magic book'. The book is about a pirate adventure on Magic Island. As Jack reads the book, he is sucked into the world and goes on numerous adventures with Prince Morgan, while fleeing the evil Blackbeard the Pirate. He is even saved by Lily, a beautiful mermaid, whom he falls in love with.