Jiang Han and his father travel around all year round to catch monsters. One day, the father and son tracked the shadow demon to Luoxia Village, where they met Lin Xuanyue, a girl from the village. When he first met, Jiang Han noticed that this girl was different from ordinary people - she actually had eyes that could see through yin and yang, and could see monsters and monsters that ordinary people couldn't see.
The investigation of the shadow demon case forced Jiang Han and Xuan Yue to walk side by side. On the way to solve the case, they repeatedly solved strange cases and faced off against evil spirits several times. As they get along, Jiang Han gradually discovers that Xuan Yue looks weak, but is actually tough and intelligent; Xuan Yue also feels a different kind of peace of mind in Jiang Han's steady and reliable protection.
As each case progresses, the unique hidden life experiences of the two people gradually surface, involving deeper secrets and past. Tests of life and death followed one after another. In the dangerous situations of resisting demons back to back, ignorant feelings quietly grew up, transcending the age gap and taking root in each other's hearts.
The road ahead is long, more sinister evil spirits are lurking in the dark, and a greater conspiracy is waiting to be revealed. Jiang Han and Xuan Yue clenched the weapons and beliefs in their hands, using courage as a shield and fetters as blades, vowing to kill the demons in the world together and walk a bright road belonging to them on the chaotic boundary between humans and demons.
