Jack and Annie are off on another thrilling Merlin Mission! This time, the magic tree house whisks them away to New York City in 1938, right in the middle of the Great Depression and a powerful blizzard. Their important task? To find and rescue a beautiful, magical unicorn. But how can they possibly find such an extraordinary creature in a bustling, snow-covered city during one of its toughest times? Join Jack and Annie as they navigate the snowy streets and discover the challenges of the past. They'll need all their courage and cleverness to complete their mission and help the unicorn, hoping it might even bring a little magic back to the struggling city. Get ready for an exciting adventure filled with history, mystery, and a touch of wonder!