Momo is recovering from her father's death and her mother's decision to move their family from Tokyo to a remote island, when she discovers a message from her father that causes strange events to occur
Arrietty, a tiny teenager, lives with her parents in the recesses of a suburban home, unbeknown to the homeowner and housekeeper. Like others of her kind, Arrietty remains hidden from her human hosts, but occasionally ventures forth from beneath the floorboards to borrow sugar cubes and other supplies. A secret friendship forms when 12-year-old Shawn meets Arrietty, but their relationship could spell danger for Arrietty's family.