Complex sentence: The main character is a young general named Yamanouchi Kagetora, who is intent on avenging his father's death by reviving the most ingenious weapon ever to hit the medieval battlefield: the Odama.
Split into simpler sentences: The main character is a young general named Yamanouchi Kagetora. Kagetora is intent on avenging his father's death by reviving the most ingenious weapon ever to hit the medieval battlefield: the Odama.