Bonnie Graham is in her friend's flat. She is alone, except for the dead body lying in a pool of blood. What happened? What will she do? And is any or all of it her fault? Bonnie is a music teacher who has spent a long, hot summer in London rehearsing with a band. It was supposed to be fun, but the tricky knots of the band's friendships unravel with each passing day. What was meant to be a summer of happiness, music and love turns deadly as lovers betray, passions turn homicidal and friendship itself becomes a crime. Someone in the band must be a killer. Is it Bonnie? And if not - who is it?