Jack and Annie are off on another Merlin Mission. This time, Merlin has sent them to rescue a beautiful magical creature—；
the unicorn. But when they land in New York City during the Depression of the 1930s, Jack and Annie are confused. Where will they find a unicorn in a big city?
From the Hardcover edition.
为了执行任务，主人公杰克和安妮需要登录月球寻找寻找一种美丽神奇的生物——独角兽。但他们却着陆在了30年代经济大萧条时期的纽约。在这个大城市里，他们去哪儿找独角兽呢？