The film opens with Ai, a young girl, moving into the Animal Village during the summer. After being put to work by Tom Nook to deliver goods, Ai befriends four of the village's residents, Rosie, Margie, Alfonso, and Yū, participating in several activities. Ai begins to find a series of anonymous messages in bottles that state that a miracle will occur during the upcoming Winter Festival if pine trees are planted in specific points of the village. Ai complies with the messages and begins planting the trees, half-believing that the messages may have been placed by aliens.
