When Hana's parents leave on a trip to Brazil looking for new plant life, she and her dog, Bunny, must move to her Japanese grandmother's house for the summer. 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 garden and perhaps more, it's up to her to save...