The story begins in the frozen lands of the Northern Wilderness Continent. Eight-year-old Ye Chen loses his mother in the tragedy that strikes Hanyue Village. Rescued by Xuan Yue, an elder of the Ice Mystic Sect's Outer Sect, he is brought into the sect. Though Ye Chen possesses the rare Ice Spirit Constitution, it has been sealed by a mysterious force. For three whole years, he is unable to draw spiritual energy into his body, earning the Outer Sect disciples' scorn as a "good-for-nothing" and enduring constant bullying and cold looks. Throughout those years, he bears the bone-chilling cold of the Ice Spirit Spring each day and secretly practices the incomplete cultivation technique left behind by his mother at night in Hanyue Forest. Humiliation and pain forge his resolve, hard as ice.
His fortunes change during one particularly cruel bout of bullying. Ye Chen is shoved deep into Hanyue Forest, and on the brink of death, the ice-crystal necklace left by his mother undergoes a strange transformation. The seal on his Ice Spirit Constitution loosens for the first time, and the surge of icy spiritual power awakens a being hidden in the deepest part of the Ice Mystic Sect: the Inner Sect's leader, Ice Elder, an unparalleled expert halfway to the Tribulation Transcendence Realm. Impressed by Ye Chen's potential and character, Ice Elder makes an exception and takes him to the mysterious Xuanyin Valley of the Inner Sect. He gives Ye Chen the ancient divine weapon Mystic Ice Sword and its sword spirit, the maiden Xu Bing, officially beginning his path of cultivation.
In the Inner Sect, Ye Chen begins practicing the ancient Ice God's legacy, the Ice Mystic Scripture. His strength grows rapidly, but he also gradually uncovers the cruel truth behind his mother's death: she was killed by Tian Shuangzi, the master of the Frostgate Sect, who wanted to steal the scripture. The fires of revenge and the duty to protect others intertwine in his heart. Meanwhile, Ye Chen unexpectedly meets Xuan Yuexin, the daughter of the Frostgate Sect. Despite the divide between good and evil and the desperate circumstances surrounding his mother's murder, the two develop a forbidden yet sincere love. In the end, Xuan Yuexin sacrifices herself to stop her father and protect Ye Chen, using her life to ease some of the hatred.