Sissel is in tenth grade, and the time has come to decide which curriculum she wants to follow at upper secondary school. She has also been offered a summer job far from home. But this summer her sister, Åshild, will turn eighteen. Åshild has Down’s syndrome, so for her this doesn’t mean freedom and new rights; instead, their parents want her to move into shared accommodation. Sissel is unsettled: what will remain of their family without Åshild?

In Biggest and Smallest, big sister is little sister, and little sister big sister. But a sister is a sister.