They say there are only 22 variation of plot. Actually they say there are seven basic plots. Well to be honest it comes down to three types of story: this guy does something, this girl does something, or this thing does something.
When you come right down to it, every story has a formula. They all follow the same basic pattern: beginning, middle, end. Even when some bright spark decides to reinvent the wheel, all they’re really doing is leaving bits off or switching them round. But you can still see the same basic equation at the heart of things. Formulaic writing is seen as a bad thing, but this formula is far from simple.