"King Otto" is a documentary film that tells the story of the Greek national football team and their unexpected victory at the 2004 UEFA European Championship. The film focuses on the team's journey under the leadership of their German coach, Otto Rehhagel, who implemented a disciplined and strategic approach to the game. The documentary highlights key moments from the tournament, showcasing the team's determination and teamwork. It also explores the impact of their win on Greek culture and national pride, illustrating how sports can unite a country and inspire hope in challenging times.