- The boy he would never forget - Water. Earth. Fire. Air. These were the four elements of the four Nations, The water tribe, Earth kingdom, Fire nation and the Air nomad. these nations have lived in isolation. only the phoenix the master of all four elements could defeat the dragon of Chao and bring balance to the world. Meliodas a descendant of the phoenix, eger to find the dragon of Chao as it was his duty as a phoenix. During his journey he met a mysterious water bender who seems to be somewhere connected to the dragon of Chao but without any memories of his past. As they set off to find the identity of the mysterious boy, these two fell in love with each other so much but what happens when meliodas had to choose between love an his duty to bring balance to the world.