50年後的世界，城市的擁擠使得建築物不斷地向上發展，交通工具皆轉變為飛行模式...
50 year later, everyone will have a multi-purpose robot that a good helper for life. In order to kept people's memories and the impression all the time, it has established the brain wave detection coil and the seeing and hearing recorder on robot’s head, it was named “The Memory Hat”. Not only could it recorded the vision and the hearing, but also recorded the picture and the sound came to people’s mind. It could project memories of “Memory Hat” when returned it on robot’s body.
50年後的世界，每個人都擁有著一台萬能機器人，做為生活上的好幫手。為了保存人們的回憶及心聲，機器人的頭部設置了腦波偵測線圈及視聽記錄器，即記憶帽，不僅可記錄視覺及聽覺，還可將心裡所浮現的畫面及聲音記錄下來。將記憶帽放回機器人身上即可將儲存之回憶由立體投影展現。
