Kaioh kills his own younger sister, Sayaka, and spreads word that Kenshiro is the one behind it. Hyoh is consumed by powerful hatred. Kaioh schemes to bring the main family of the North Star to an end. Right in the middle of the funeral for Sayaka being held in Kaioh's castle, an Asura named Gyoko's battle train crashes in. Gyoko, rolling in front of Kaioh, bears a message from Kenshiro: I am never defeated twice! Hyoh, believing that Kenshiro killed Sayaka, is consumed in powerful hatred upon hearing that, and takes his first step towards the dark world... (thetvdb.com)