Listening to both story and instructions, it’s an experience where you become both audience and performer (don’t worry, you won’t be asked to do anything illegal or embarrassing). This a no requiem, this is a celebratory slow dance.
To take part you should sign up here, then a few days before the event you will receive an email telling you where to download the MP3, and a secret area in the city to go to. You need to come along with a partner, and both of you will need to bring your own MP3 player (you don’t both need to sign up though).