Kanfah, the grandson of a respected herbal doctor, travels to Wiang Asawa and becomes entangled in a political murder where a mysterious man named Thayu is falsely accused. After Thayu is poisoned by a venomous spider, Kanfah saves him, forcing the two to flee together through the dangerous highlands of Mueang Mang. As they uncover a conspiracy tied to the teak trade and local superstition, their partnership deepens into trust and quiet affection. Together, they must expose the real killer before the region descends into conflict.