Here is a story flow that I end up using often for investor pitches of my clients:

• Good idea
  • Once, there was a situation
  • Something changes/changed
  • This creates an opportunity/problem
  • It's not easy to solve it
  • Enter [company]
  • It's clever
  • It's different from the competition and alternatives
• Good business
  • Market: lots of (potential) users
  • Market: lots of dollars
  • Profitable: Unit economics work, company economics work (when company reaches scale)
• Good startup business
  • Product/feature pipeline is doable
  • Sales & marketing strategy is doable
• Good company
  • Team knows what they are doing
  • Traction shows that things are gaining momentum
• Good deal (often not covered in a presentation)
  • Board configuration
  • Deal terms