In "The Boxcar Children" by Gertrude Chandler Warner, the story begins with a pivotal moment where the characters find themselves in a challenging situation. The phrase "rolled the door shut, and then it really began to rain" signifies a turning point or new beginning. It suggests both a retreat from the outside world and the onset of difficulties, setting the stage for the adventures that follow.

This moment encapsulates the theme of resilience in the face of adversity. As the rain pours down, the characters must navigate their circumstances, relying on their ingenuity and determination. The story unfolds as they take on the challenges ahead, illustrating their strength and resourcefulness amidst tough times.