瘦弱的高中一年級學生—小早川瀨那，因時常跑腿而有驚人的速度。因此被泥門惡魔蝙蝠隊隊長—蛭魔強迫拉攏入隊充當著神秘的光速蒙面俠21。加入泥門高中的美式足球社後，目標與泥門惡魔蝙蝠隊的隊友們一起打入「聖誕節大賽」。
When Star Butterfly destroys her wand to save her best friend Marco Diaz, a new unicorn takes place of the dead one. Now Star only has half of the star on her wand and it has been cleaved. She needs all the pieces of the wand but the other half was lost in the explosion. Join Star and Marco in their new adventure ahead!
