Larry Brooks, writer, says:
The most important moment in your story is when everything changes for the hero. When what the hero believes is her reality experiences a sudden shift. Suddenly there’s a new deal on the table that sends your hero down an altered, unexpected path. And, as part of that new deal, the reader gets a sense of what stands in the hero’s way.
That moment changes your story. And in doing so, it could be argued that this is when your story really begins. Everything that happened prior to it was just a set-up.
It’s called the First Plot Point. And you can’t mess with it.
I just don't known enough about writing to dispute him at this point. So I'll take it under advisement.