在中国西南方的深山部落裡，谣传一种古老的巫术。 女孩可以用它守护自己的爱情，让爱郎永不变心。这就叫做『蛊』。
养在鼓囊沉睡的蛊虫，在一阵击鼓声中惊醒互食、交融变形。杵捣模煳的蛊虫肉浆与女孩的手滴血浸濡在一块儿，掺和着如涟漪一般的咕哝嘟嚷巫术语，漾开一段女孩思念爱恋的想望，再造一缕缕永恆坚定的千古信念......

A village located in the mountains of South China practices an ancient charm, which a girl may use to secure her lover's loyalty; this charm is known as "GU".
To complete the charm one must obtain a drum with a GU bug slumbering in it. The drum must be beaten to excite the bug as it readies itself to be mixed and consumed with a drop of blood of its owner. A young girl hoping to find love, decides to recreate this thousand year practice…