King Arthur: Legend of the Sword movie plot

In Rondiniam 1500 years ago, humans and wizards had cleverly maintained peace for centuries. They were in trouble. King Uther was betrayed by his younger brother Vottigung, and his only son was floated along the river. Then 15 years later, the abandoned child was named Arthur, lived at the bottom of society, and believed that he was the illegitimate child of a prostitute. Votigeng monopolized the power, consolidated his rule with the help of other world forces, and also built a huge tower to strengthen the rule, so that the people didn't have a lot of livelihood. By chance, Arthur drew the sword of the king that only the descendants of the king could draw, but Arthur was arrested and imprisoned. Bedwell and a mysterious magician rescued him. Only then did he learn about his own life and the fact that Vottijn had killed his parents. His life had changed drastically, and he had to accept his true mission and support. His mages and people overthrew the tyrannical rule of Vutikeng and vie for the throne.