Lady on a Train ending explained

Spoiler summary page for informational search intent.

What happens at the end?

While watching from her train window, Nikki Collins witnesses a murder in a nearby building. When she alerts the police, they think she has read one too many mystery novels. She then enlists a popular mystery writer to help her solve the crime on her own, but her sleuthing attracts the attentions of suitors and killers.

Why it matters

The ending resolves the main conflict and sets up the emotional takeaway of the story. As the index grows, this block can be auto-generated with more detailed scene-level commentary.

FAQ

Does this page contain spoilers?

Yes. The explanation summarizes major ending events and interpretation.

Where can I find similar endings and themes?

Check the similar movies page for related tone and narrative structure.