In a decaying, abandoned megacity where echoes of the past can speak, players step into the shoes of Echo Librarian Quinn, a quirky audio detective with a knack for deciphering soundwaves. As Quinn uncovers hidden secrets while navigating through the diverse neighborhoods of Soundwave City, players must choose how to interact with the unique echoes of its former residents. By piecing together sound clips, dialogues, and memories, they must unravel the enigma of a missing sound - an echo that could change the course of history. Every choice reverberates through the narrative, leading to multiple endings based on what Quinn uncovers about the city and its past.