His mother use her power to take them to the other world, when arrived there the friend of his father met them and told them where his uncle prison his father. Hercules go to the place that his uncle told him about and defeated all the guards and free his father.
Then they went to his uncle and a battle took place. Hercules defeat his uncle and killed him and his assistants. When everything came back as it was, the first thing that Hercules think about was the people on earth and how they suffering of difficult living conditions. Suddenly the curse gone and he regained his strength and beauty.
In the end, Hercules became the ruler of the planet and spread justice and equality everywhere. And they lived happily ever after.