密娜和弟弟漢密斯，好朋友珍朵大塊頭、潔樂絲一起發現了一個樹洞，作為秘密基地。密娜在樹洞旁吹奏著媽媽留給她的樂「淚」，吸引了西修斯的出現，雖然西修斯有著和傳說中惡魔一樣的翅膀，密娜和朋友們還是和他成為了好朋友…但是，爺爺卻說有翅膀的西修斯是怪物！好朋友潔樂絲也因為忌妒心，竟然告訴村民們惡魔就是西修斯！眼看村民們就要傷害西修斯，忽然有個神秘的人把西修斯救走了！傳說中惡魔造成的災難果然來臨…西修斯真的是惡魔嗎？密娜他們該怎麼辦…
Mina and her little brother Hermits, together with best friend Gender, the big fellow, and Jealous discovered a hole in a tree trunk. They treated it as a place of their secret hideout. When Mina played the flute "Tear Drops" her mother gave her under the tree, Seth, attracted by the music, appeared. Though he had wings like that of the legendary devil, they soon became good friends…however; Grandpa insisted that the winged Seth was a monster! Jealous, out of jealousy, told the villagers about Seth, about that he is a devil! Just as the villager about to harm Seth, a mysterious character came to his rescue! Disaster followed as the legend foretold…was Seth really a devil? What should Mina and her friends do about it…