When Hana's parents leave on a trip looking for new plant life, she and her dog, Bunny, must leave their home in America and go stay with Hana's grandmother in Japan. With no Internet and no cable TV, Hana feels cut off from the world. Soon after Hana and Bunny arrive at the house, things start to get strange. Hana discovers a garden with talking flowers and insects. When she finds out that zombie weeds are about to take over the world, it's up to her to save the garden and the world. Will she save her friends, or will the garden finally fall under a wicked spider's control? The ancient Japanese art of Ikebana - flower arranging - may hold the answer.