Set in a modern dystopian city where society is governed by the echoes of memories and thoughts, players assume the role of a memory detective, tasked with unraveling a series of mysterious incidents that are haunting the citizens. As players interact with various characters, they must identify whose echoes, or memories, resonate within key locations throughout the city. Each decision they make influences the echoes they encounter, revealing hidden truths or twisting their understanding of the past. As the narrative unfolds, the lines between the detective's own memories and those of others blur, leading to a gripping and dramatic climax that challenges the player's perception of reality.