由于基因突变，两兄弟中，弟弟从小体温异于常人，拥有着冰系超能力，而哥哥拥有的则是火系超能力，阴差阳错兄弟二人被分开。哥哥被收养他的日本人培养成了一个强大的杀手，同时中国的一个神秘组织也在联系着弟弟。哥哥受命劫持了弟弟的恋人，再次见面时两人成为了敌人，大打出手之间哥哥认出了弟弟小宇，经历了种种，最终两兄弟顺利相认并联手打败了敌人。

Due to a genetic mutation, of the two brothers, the younger brother grew up with an unusually high body temperature and possesses ice powers, while the older brother possesses the fire system. The older brother is trained to be a powerful assassin by the Japanese who adopted him, while a mysterious organization in China is also in touch with the younger brother. The older brother is ordered to abduct the younger brother's lover, and when they meet again they become enemies, and during the fight the older brother recognizes the younger brother, Xiaoyu. After all they have been through, the two brothers eventually recognize each other and join forces to defeat the enemy.