in a whodunit - in a detective story - in a crime story - in a mystery novel - in a suspense story - in a thriller
"In a mystery" refers to being within the context, atmosphere, or narrative of a mystery story or situation. It typically implies that events are unclear, characters' motives are hidden, and important information is deliberately obscured to create tension and curiosity. The phrase is often used to describe scenes in detective fiction, crime novels, or suspenseful narratives where the outcome is unknown and clues gradually emerge. Beyond literature and film, it can also describe real-life situations that feel puzzling or unexplained, emphasizing uncertainty and the process of uncovering the truth.