While enjoying the blossom gardens, Sailor Moon (Usagi) and friends encounter a classic childhood friend of Mamoru's: an alien! He's come back to offer Mamoru a distinctive blossom, however, does not enjoy the others of the inhabitants of the planet and Usagi. Sailor Moon must defend the ground from the evil Kisenian Flower he's brought back... until the evil vines and blossoms all over Earth!