"Mount Heng Sect is my home, and my senior brothers are my family!" Ignored by his indifferent father and tormented by his stepmother, a young boy named Lee Goonak was sold off for a mere twenty gold coins and sent to the Mount Heng Sect. For the first time in his life, Goonak felt the warmth of affection and the happiness of belonging. However, his training journey alongside his master was filled with life-and-death battles and unbearable solitude, leaving him with only one dream: to return to the Mount Heng Sect. Ten years later, after being struck by lightning, Goonak mastered the Mount Heng Sect's exclusive martial art, the Golden Eye Thunder Spirit Art, reaching near perfection at the 12th level. At last, he was able to return to the sect. Now, Goonak's struggle to protect the Mount Heng Sect and his senior brothers begins!