What is the plot in The Boxcar Children?

In The Boxcar Children, four orphaned siblings named Henry, Jessie, Violet, and Benny are forced to live on their own after their grandfather passes away. They decide to move into an abandoned boxcar in the woods near their home. The children must learn how to survive on their own, finding food, clothing, and shelter. They also face challenges such as dealing with bullies and a mysterious stranger who seems to be watching them. As the story progresses, the children uncover the truth about their family and their grandfather's past, and they eventually find a new home and a sense of belonging.