After running away from home, a 14 year old boy finds a magical coin which sends him back in time, only to discover that he is the long lost son of the infamous pirate Blackbeard.

Perhaps you should incorporate what he does. You have a protagonist, you have an inciting incident, but what happens after he finds out he is Blackbeard’s son? What is the goal?

“After running away from home a young boy finds a magical coin that sends him back in time to discover that he is the son of the pirate Blackbeard, who he must confront if he is going to return home.”