Common Summoner

Long ago, a city was created to hold a population of Earth's summoners. The citizens of the city known as Armsen practice the art of summoning for battles against the forces of evil.
Scott Calibur, of the city's famous Calibur family, is a "late bloomer" in mastering the art of summoning.
The Calibur family is a family known for the founding of the city, dating back to the famous Excalibur.
Scott is picked on by many for being the only one of his age in the city of Armsen to not master summoning. What will he do when he meets a member of the city's other famous family, the Helms, who are descendents of the famous Black Knight? What will he do when Armsen is attacked by a formidable foe that's too great even for the Caliburs and the Helms?