Samantha and her friends make some surprising discoveries about her past. Then word comes that Nellie and her sisters are in serious trouble. It's up to Samantha to save her friends before it's too late.
While spending the summer at Grandmary's home on Goose Lake, Samantha and the twins Agnes and Agatha decide to visit the island where Samantha's parents were drowned during a storm.
When she discovers that Nellie and her sisters have been sent to an orphanage, Samantha, now living with her aunt and uncle in New York City, tries to help her friends as much as she can.
Nellie O'Malley finally has a home again. She and her little sisters, Bridget and Jenny, are happily settling in with Samantha's family in New York City ..."