Researchers at the Computational Story Lab at Burlington's University of Vermont data-mined through 1,700 popular fiction stories and determined that they all follow one of six emotional arc types. They are as follows:
A rags-to-riches, steadily rising emotional arc, as in the case of "Alice's Adventures Underground" by Lewis Carroll.
A steadily declining emotional arc, often seen in tragedies, like in Shakespeare's Romeo and Juliet.
A fall and then a rise.
A rise and fall.
Rise-fall-rise, like in the "Cinderella" fairly tale by Charles Perrault.
Obviously the professor didn't analyse 'Second Chance' by Number 7 - fall-rise-fall-rise-fall-rise...
(Speaking of which, an update is long overdue. I hope Number 7 continues the story.)