Bai Shuo, the youngest daughter of the General's Mansion, aspires to cultivate immortality in order to repay a favor. On her journey to seek immortality, she accidentally rescues the great demon god Fan Yue. As the saying goes, healthy fights strengthen relationships, and they go from mutual manipulation to mutual affection as they fall in love with each other, navigating a love affair intertwined with sweetness and cruelty. Even though they face countless difficulties, their love is strong enough to overcome all limitations, allowing them to truly embrace each other.
In an era when the demons are in power, they are the masters of the despicable cultivators and mortals. The cultivator elders deem it necessary to send someone back in time, to determine the origin of the demon lord and to prevent his awakening. Li Su Su accepts the mission, becoming the mortal Ye Xi Wu, General Ye's third daughter who is married to Tantai Jin, the hostage prince and future demon lord. She is determined to destroy Tantai Jin, who in the future will massacre many. But as a witness to Tantai Jin's past life and rise to power, an unexpected tale emerges, one complicating her quest.
The film is the beginning of the entire story of Battle Through the Heavens; Xiao Yan, a talented young cultivator, to restore his Dou Qi and regain his dignity, with the guidance of "Yao Lao", leaves Wu Tan City alone and steps into the treacherous and dangerous Magical Beast Mountain Range, the beginning of the trial journey of searching for the Heavenly Flames to improve his cultivation.