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隋朝末年，天下大乱。大业十四年三月十日江都兵变，炀帝被侍卫所杀，江上却突然降下浓雾，十数日不散，不分昼夜，日月无光。传说炀帝广修运河之时，惊动了《山海经》中所载的神兽夔牛。一时间妖兽四起，天下大乱，民不聊生，各方江湖人士齐聚神秘的渡口驿站“草行渡”，整个客栈内是敌是友，扑朔迷离，天下究竟要何去何从……。Karma starts her new job at the recording studio with Lady K but gets distracted from her duties when Jayla and Tayla post several rap challenges online.。