General:
* Summary: A brief overview of the main events.
* Synopsis: A concise account of the most important points.
* Narrative: A story or account of events, often in chronological order.
* Account: A detailed report or description of events.
Specific:
* Plot: The sequence of events in a story.
* Timeline: A chronological listing of events.
* Log: A record of events or activities.
* Analysis: An examination of the causes and effects of events.
* Explanation: A clear and detailed description of how something happens.
More specific examples:
* "A description of what happens in a play" could be called the plot summary or synopsis.
* "A description of what happens in a scientific experiment" could be called a methodology or procedure.
* "A description of what happens in a historical event" could be called an account or analysis.
To get the most accurate term, please provide more context about what "what happens in" refers to.