The Tiger God, the incarnation of justice, entrusts the Lin family with the task of fighting the demons living deep in the forests of Dakeng – the mô-sîn-á. This prequel to the movie The Tag-Along combines legend with adventure and a coming-of-age tale. Will our protagonist take up his family’s burden and become a hero?

The mô-sîn-á demons are said to live deep in the mountain forests of Taiwan, luring travelers from the path. To suppress the demon threat, the Tiger God descends from heaven and possesses the head of the Lin clan, a prominent Dakeng family. Generations of their family, now marked by their tiger tattoos, carry on the tradition of protecting their village home.

Lin Chun-kai is the youngest of the Lin clan, raised by his grandfather after his parents died in a car crash. He dreams of taking on his grandfather’s role as agent of the Tiger God, yet his grandfather is reluctant and believes Chun-kai’s parents died because they were soon to take over his work. He forbids Chun-kai from setting foot in the mountains and hopes to see his grandson set aside the family’s sacred mission and live a peaceful life.

One day, a girl from Chun-kai’s school goes missing. Searchers can find no trace of her and her parents come to Chun-kai’s grandfather for help. Chun-kai himself, responding to pleas from one of the girl’s friends, sets off for the forbidden mountains.

The story is a prequel to the 2015 Taiwanese horror movie The Tag-Along, featuring local legends and a fantastical setting but not losing realism and emotional connection. It combines legend with adventure and a coming-of-age tale.