A group of art students gather at your cousin's birthday party where the guest of honour is murdered. One of them is the killer, and everyone is a suspect-including you. You ask everyone in the group to write letters to you, talking openly about what happened, and sharing artworks they've done in the period of time before, during, and after the party. People say artists show their soul through their art ... now it's up to you to discover the darkness inside someone you trusted. A Bloody Birthday is a story told through letters, objects, and artworks. The reader is a character in the story, invited to guess the identity of the killer through the clues and insights waiting to be unravelled.