Luana Harrington, her husband Ben, his mother Tutu, and the five children live on a pineapple plantation on the island of Maui. Emma Lu, the eldest, has recently returned from San Francisco, where she graduated as a nurse and became engaged to a Sherman Grant. Margaret Lester, Luana's sister-in-law, who lives in San Francisco, is visiting with the Harringtons. She is an artist and plans to enter an art contest in which Luana is also interested. They plan to search for Bo, a twin, who has run away.