The episode begins with Sonshoukou, Rikuson, Ryomou and Kannei travelling up the foggy Choukou towards Sekiheki (赤壁), with Sonshoukou wanting to defeat Sousou. When the fog clears, they are shocked to see a huge water fortress before their eyes. Soon, an arrow shower is unleashed, and they are forced to retreat, much to Sonshoukou's displeasure. Back at Koutou, Kougai is mad, yet relieved at Sonshoukou's return. Ryuubi notices a letter attached to one of the arrows...