Trial By Fire, Volume One of the Everstar Saga
Alexander, who goes by Alex to most people, [That's not important enough for the synopsis. Just call him one or the other.] is a teenage halfling gifted with the ability to manipulate fire, living in the city of Mora at the story's outset. [Those last four words are wasted.] In this context, "halfling" means someone who has parents of two different races. [That sentence isn't needed; the next sentence makes it clear what the word means.] In Alex's case, his father is human while his mother is of the Kenlor, magical woodland tribespeople considered savages by the humans (a la the European viewpoint of the Native Americans). [Also the European viewpoint of current Americans.] Alex's status as a halfling incites persecution from his fellow townspeople, who see him as a disgrace to the town and a possible threat, as halflings are stereotyped as having uncontrollable powers as a result of their parentage. However, Alex is indifferent to their animosity and is even proud of his heritage(s). This pride causes tension with his cousin, Karen, who is also a halfling but hides it to avoid persecution. [This is all set-up. Focus on what happens.] Eventually, their bickering lands them in a situation where they and their family are pursued by a corrupt officer of the Royal Guard who hopes to destroy them. Their flight from the law leads them to seek shelter on a mysterious island with a peacekeeping fraternity called the Knights Telessar. [A peacekeeping organization should be headquartered somewhere violence is likely to break out, not on Fantasy Island.] While staying with them at their training Academy, Alex learns more about his heritage(s) as his parents, in concert with the Knights, prepare him to assume his rightful place not only as a part of Kenlor society, but as a king. [His father is human and his mother is described as "of the Kenlor, magical woodland tribespeople considered savages by the humans." No mention of either parent being royalty, so why is Alex's rightful place king? If humans think Kenlor are savages, why would humans or Kenlor want Alex as their king?] However, he is not without opposition. In his journey toward power and self-realization, Alex must confront not only prejudice and persecution, but betrayal, romantic tension and rivalry, friends ranging from outright crazy to downright buffoonish, the machinations of a corrupt politician, kidnapping, and torture. [You finally get to the stuff we want details about, and you just list it.] Through it all, he learns to think strategically, relate to others, and to use power not out of anger or revenge, but out of a responsibility to protect and defend those placed under his protection.
Drop the last two sentences, which are just lists, divide the rest into three paragraphs, and you'll have a synopsis just brief enough to go in your one-page query letter (though one with too much set-up and not enough plot).
However, what you were trying for is the kind of synopsis that might be requested along with your manuscript. It should be longer than this (how much longer depends on what the recipient wants), paragraphed, and more detailed, especially in plot. It should tell us the main character's story.
"Kenlor" sounds like a coating for frying pans.