Eighteen-year-old Lin Dong lives in Licheng, a town that seems peaceful and serene. His father, Lin Beiyang, is the town's renowned martial arts school owner, and his mother is a virtuous homemaker. But a fire ten years ago claimed the life of Lei Heng's wife, leaving an unfathomable rift between the Lin and Lei families. The childhood betrothal between them became an awkward thing of the past.
When Lin Dong begins investigating the truth behind the feud between the families after his childhood friend Lei Shanshan asks him for help late one night, he unexpectedly gets caught up in a vast conspiracy surrounding the rare medicinal herb known as Blood Poria. The mysterious Black Fiend Sect has quietly infiltrated Licheng, using ruthless methods and repeatedly targeting the Lin family, while keeping Lei Heng firmly under its thumb.
The old feud has yet to be settled, and a new crisis is already looming like a storm cloud over the city. Lin Dong and his father, Lin Beiyang, are forced to join forces and venture deep into the perilous Wangxian Mountain to strike at the Black Fiend Sect's secret stronghold, the Blood Cavern. But waiting for them are not only vicious enemies and uncanny traps, but also a cruel truth capable of overturning everything they have believed for ten years. At the brink of life and death, the previous generation's feud is settled in the most brutal way, and Lin Dong is forced to grow up quickly through blood and fire.
