John Truby’s screenwriting courses and software are a staple of screenwriting classes worldwide. His book,The Anatomy of Story: 22 Steps to Becoming a Master Storyteller
, presents his “Twenty-Two Building Blocks” plot structure is a classic. I purchased one of his first video writing courses mumblety-mumblety years ago when I was writing comedy and spent a lot of time in L.A. Truby combines the mythic story structure of Joseph Campbell (used for such blockbusters as “Star Wars”) with some original expansion to create his twenty-two building blocks. The overall structure is loosely follows the three-act format.
A key concept of Truby’s technique is that plot is what the Character does while the Character is defined by his actions. Essentially, the plotline is the result of the Hero’s (Protagonist’s) actions movtivated by his internal need and an external desire or goal. It’s the classic story structure and in his works, Truby applies his structure to a number of successful classic films (keep in mind Truby has always focused on screenwriting, however, his techniques are the same ones used by blockbuster and enduring novelist as well).