宋末蒙古蒙哥大汗(hàn )南(📼)下侵(qīn )宋,途中遇到飞(😘)天炮阻(zǔ )击身(🕰)受重伤(🍥)。后法王虽(🆖)偷得(dé )(🐉)飞(fēi )天炮(pào ),然蒙哥伤(shāng )势加重(chóng ),只得撤兵。返程(chéng )中被(♑)忽(📼)必烈偷(🖲)袭,逃(táo )入雪(xuě )山(shān )。蒙(méng )哥感到(dào )命不(bú )久已,写下(🥄)血书,传位(🐖)尚年幼王子(🎫)海都后自尽。大雪山中人马走(🕕)散,飞(fēi )天(🤷)炮和(hé )血(xuè )书失(🌙)踪,海(hǎi )都(🔩)逃出(chū )(🌚)雪山(🚨)后(🛑)遇到受(🖲)伤的(de )法(fǎ )(💱)王,原(yuán )来他受到中原三大高(🔝)手的(de )袭击,他(🤸)们一起返回(🙀)雪(🙉)山找寻(xún )其它队伍但是雪山(🧤)迷宫使(shǐ )他们放弃(qì )。与(⛳)此同(tóng )时(shí )三大高手也感无力进入(rù )雪(👣)山,将进雪(xuě )山迷城的(🥊)地图分成三份交各人保存。法王带(🐨)着海都(🤷)勉(miǎn )强到(dào )达(🌼)师弟银枪(qiāng )法王处,将海都(dōu )(🎥)托付给师弟后毒发(⏲)身(📛)亡。海都从此身负夺回帝(dì )位的重(chóng )任。