My friend did Story Listening for her VERY FIRST lesson ever! She's not even in front of kids yet - this was for the other future teachers in her class and is designed to be a 15-minute "sample". Here's how we developed her lesson:
First, she watched my Story Listening session (the one about the volcanoes). Then, she picked a story she thought would be interesting to tell, a Curious George book. She thought about how to tell the story in comprehensible Spanish. Then, we simplified it to be as easy as possible. After narrowing down the story to a single problem and a single way to solve the problem, we also adjusted the story to make use of as many proper nouns and cognates as possible. This story is the result.
"George is a monkey. George is curious. George sees a mouse. George touches the mouse. The mouse escapes. He doesn't see the mouse. It is a problem. He goes to _____. He doesn't see the mouse. It's a problem. He goes to ______. He doesnt see the mouse. He sees the mouse in ______. It is not a problem. It is perfect. The end."
The underlined words are the words she's going to pause and do TPR with in context of the story ("show me _____.") - this is something I added in in my most recent story ("El escape cubano") as well to help me slow down even more and make sure my students are with me as well as getting key words. I found it to be very helpful.
Then, in order to do Story Listening, she planned out what she would say and how she would illustrate it on the board. In essence, this is her "lesson plan" that she's going to use to remember what to tell the "students", where to pause and do TPR, how to illustrate the story in a comprehensible way. Finally, she's going to have the students read and translate copies of this paper.