In the middle of the Aegean Sea, six men on a fishing trip on a luxury yacht decide to play a game. During this game, things will be compared. Things will be measured. Songs will be butchered, and blood will be tested. Friends will become rivals and rivals will become hungry. But at the end of the journey, when the game is over, the man who wins will be the best man. And he will wear on his smallest finger the victory ring: the Chevalier.
For middle-aged Kostis, life has passed him by. As the newly appointed doctor of a tiny island, Kostis spends a dreary winter alone. By the time summer arrives, though, the island has turned into a thriving, wild vacation spot with nude beaches and crazy parties. When Kostis meets the beautiful and flirty Anna, he falls hard for her and goes out of his way to conquer and impress her. Before long, Kostis is spending nearly all of his time getting drunk, partying hard, and even making out with Anna. What starts as a rediscovery with his lost-long youth, though, slowly turns into an obsession as Kostis is willing to do whatever it takes to keep his Anna. Suntan celebrates the beauty and strength of the youthful body, while simultaneously embracing its inevitable decay.
The story of a man who feels happy only when he is unhappy, a man addicted to sadness, who has such need for pity, he's willing to do everything to evoke it from others. This is the life of a man in a world not cruel enough for him.