宋末蒙古蒙(⛲)哥大汗(hàn )南(nán )(📼)下侵宋,途(🔼)中遇到(dào )飞(fēi )天(🕟)炮(🕸)阻击身受重(chóng )伤。后法王(🎹)虽偷(tōu )得飞天(tiān )炮,然蒙哥伤势加重,只得撤兵。返程中(🏇)被忽(hū )必(bì )烈偷袭,逃入雪(👑)山。蒙(🗄)哥感到命不久(🙍)已,写下血书(shū ),传(chuán )位尚年幼王(🎿)子(🎫)海(🥞)都后自(🍮)尽。大(dà )雪山中人马走散,飞天(🤷)炮(🔊)和血书失(🌙)踪(zōng ),海都逃出雪山后遇到(😞)受(🖲)伤(🔢)的法王,原来他受到中(zhōng )原(yuán )三(🙂)大高(gāo )手(shǒu )(✋)的袭击(jī ),他们一起返(fǎn )回(huí )雪山找(zhǎo )寻其它队伍但(🥫)是(🤷)雪山(shān )迷宫使他(tā )(🕙)们放弃。与此同时(🎋)三大高手也(yě )感(🧣)无力进入雪山(🗳),将进雪山迷城(🏉)的地(dì )图分成(💍)三份(fèn )交各(gè )人保(bǎo )存。法王带着海都勉(🃏)强到达师(🚶)弟银枪法王处,将(jiāng )海(hǎi )都托(🐡)付给师弟(dì )后毒发身亡(wáng )。海都从(cóng )此身负(♌)夺回帝位的(de )重任(🏴)。