A small village boy, who is living a meaningless life, finds himself in a friendship with a mysterious dragon and embarks on a series of challenges from a sadistic entity to cement his place in life.

Consider the following:
Formula: A [CHARACTER], must [do the ACTION/GOAL] when [a MAJOR EVENT occurs].
Example:
“A simple village boy embarks on a [show don’t tell “series of challenges” that lead to a goal] with an enigmatic dragon when [a sadistic entity causes a MAJOR EVENT]”

Hope this helps, make this yours.