The Clock family are four-inch-tall people who live anonymously in another family's residence, borrowing simple items to make their home. Life changes for the Clocks when their teenage daughter, Arrietty, is discovered.

Due to 12 y.o. Anna's asthma, she's sent to stay with relatives of her guardian in the Japanese countryside. She likes to be alone, sketching. She befriends Marnie. Who is the mysterious, blonde Marnie.