On a day full of rainbows, a little girl finds a unicorn knocking on the door of her treehouse. The unicorn must be lost! Luckily the girl knows just what to do. Together they visit places all around the town to see if they can find the unicorn’s home. From the pet shop to the funfair, children will love lifting the flaps to find out more about where the girl and the unicorn are heading on their delightful adventure. And they might just discover that the perfect home was a lot closer than they imagined.