爱丽儿是海中一条自由自在的小美人鱼，她向往自由，海底的世界似乎她看得有点厌了。这天，她突发奇想，想冲出海底，看看陆上精彩的世界。于是，她就真的冲破了美人鱼的限制，浮上了海面。当她看到了英俊的王子时，她彻底被征服了。为了能和王子相爱，小美人鱼爱丽儿决定以自己美丽的歌声为代价，换取一双平常人类女子的腿。在好朋友的支持和鼓励下，爱丽儿不顾一切向着自己的梦想出发！
故事主要讲述了部落阵营的MT、傻馒、劣人、呆贼等一行人，在艾泽拉斯大陆里相互认识、相互集结、相互扶持的暖心旅程。途中不乏热血与搞笑的片段，但身为同伴的彼此，对朋友的帮助、对战斗的坚持、以及对敌人的勇敢，是冒险历程中最可贵的情感。
Based on the smash video game series by Double Fine Productions (Psychonauts, Broken Age) and the world originally created by Tasha Sounart, Costume Quest is a funny and mysterious animated series aimed at six to 11-year-olds. The show stars four kids facing off against the dark forces lurking in the shadows of their sleepy town of Auburn Pines. To overcome obstacles and achieve their goals, they must learn to unlock and master the magical powers of super-normal costumes-with each costume comes a new set of transformations and powers.
无极之渊大战后，破阵、浮丘等人被石化封印。山鬼谣独担重任，力挽狂澜。同时穹奇希望重铸神坠来解开封印，而破阵则希望重铸神坠以加强封印，辛垣、夜阳怀着不可告人的意图夺取记忆珠欲控制破阵等人。
