Diptheria hits town and that means the kids need to leave. So Kookie, Cissy and Tibbie leave with their teacher Ms. May and head to meet up with the Bright Lights Theater Company and their previous teacher. They join the company on the Sunshine Queen and set sail down the Missouri River. There is a whole cast of unique characters who round out the group aboard the Sunshine Queen on their adventures on the river. The book does start out a little slow, but it is a gentler read.