5 Steps
1.  The Hook – Introduce Your characters, leave names out for incidental characters.

2. Act 1 The Slice of Life – The point of no return for your main character. No backstory or subplots.

3. Act 2 No Going Back – Your character can’t go back so what action to they take to move forward?

4. Act 3 The Climax – Change from “all seems lost” to a new hope or action to win the day.

5. Closing – Wrap it up and give the ending.  

Adapted from https://pitchwars.org/pitch-wars-synopsis-simplified/