Internationally renowned a cappella sensation Semi-Toned return to Edinburgh, following three consecutive sell-out runs at the Fringe! This year, the boys in burgundy bring a mystery-themed show, featuring their signature mix of a cappella singing and side-splitting comedy. When one of their own goes missing, it's up to the group to figure out what's happened to him in a comedy-locked room mystery. No one is safe from the finger of blame... not even the audience!