This is the prologue of a story I wrote. Please tell me if its good.

Prologue:
Now, at one point in life everything comes together. This is a story that starts out with three events happening at almost the same time.
First, a young boy (maybe the age of thirteen) was practicing swordplay with his teacher, when he slipped. His sword went flying through the air, and the blade went right into the window, but the window did not shatter.
Second, a cloaked assassin had his bow aimed at his target. He shot, but right when it was passing in front of the window, a sword mysteriously stuck right out of the window, and the arrow clanked of the sword and fell to the ground.
Third, a man in a blue robe and a beard was standing near a building, when he heard a loud “thud!” coming from behind him. He turned, and he saw an assassin dodging behind the building and fleeing. He also saw the arrow lying on the ground, and the sword sticking out of the window, and understood. He reached into his pocket, and took out a small torch. Then he swirled his hand near the torch, and suddenly the torch flared with the light of the flames. He finally took at small pouch out of his pocket, and, as he threw the torch onto the building, poured the pouches contents on the flames. He then mysteriously “floated” to the roof of the building. He snickered as an evil grin spread across his face.