The Yeast

In 'The Yeast', eighteen-year-old Da-seul helps her father run a traditional makgeolli brewery. Their struggle stems from the unknown origin of the 'nuruk', the yeast crucial to the brewery's success, preventing official distribution. When Da-seul's brother, Da-hyeon, replaces the traditional nuruk with a commercial version, his actions lead to unforeseen consequences that affect Da-seul's health and the family's legacy.

As Da-seul begins to exhibit troubling symptoms, claiming that "the nuruk is gone," her brother's initial disbelief turns to concern as he investigates the situation. This mystery deepens when Da-hyeon uncovers unexpected truths surrounding the nuruk. The film's narrative unfolds through a blend of personal conflict and a chaotic episode involving homeless individuals, ultimately forcing the siblings to confront their past.