The narrative centers around the friendship of the two main characters, Hyo-geun and Ki-chun, who serve as firefighters. It delves into their profound sense of duty and examines the theme of mortality. In a world where most people shy away from danger, this story shines a spotlight on those who face it head-on. It aims to authentically portray the lives of firefighters, sharing their real experiences and evoking a profound emotional connection with the audience. The musical encapsulates a single day in the lives of Hyo-geun and Ki-chun as they rush to overcome someone's hardships and alleviate their pain, even when others might perceive it as insignificant. This portrayal is brought to life through vivid sensory elements and a visually immersive presentation. As a captivating mystery psychological musical, it combines the narrative elements of a novel with a captivating stage performance. It provides a unique Korean perspective on the profound exploration of the concept of "death."