Prospero was the Duke of Milan, and ruled over the city with the support of the people.
Prospero became too focused on his hobby, which was studying, and lost interest in being a duke, so his brother slowly took his place as leader.
One night Prospero´s brother attacked the city with an army and demanded to be let in the gates, he wanted to take control completely away from Prospero. They opened the gates and Antonio became the new Duke of Milan.
Prospero narrowly escaped on a ship in very bad condition, but with the help of the gods was able to arrive safely on an island.
When Prospero arrived at the island he found Ariel trapped in a large tree and freed him, which made Ariel his kind of servant.
When he notices a ship sailing by and realizes that it´s his brother Antonio and other Milan officials, he creates a storm to drive them off course and onto his island. It´s successful and he makes them crash and land on his island