This is a modern, suspenseful soundtrack with a full sense of atmosphere, with a string as the base and a graininess of the synthesizer. Synthesizer piano simulates the rhythm of the heart beating layer by layer, the deep and long string music renders the suppressed mystery, the grainy synthesizer tone constantly enhances the tense atmosphere, the rhythm gradually tightens, pulling the mood step by step and uncovering the suspense fog. It is suitable for scenes such as suspense plot explanation, reasoning and probing fragments, film and television suspense transition, secret room plot, suspense short play editing, etc., and is suitable for video styles such as dark suspense and criminal investigation reasoning.