A murder in broad daylight...A teenage girl is killed on a London bus. The case should be simple. The bus was full of witnesses, and there are cameras everywhere. A hunt for a killer...But the more DC Georgia Shaw and her colleagues Maeve Kerrigan and Josh Derwent delve into the crime, the more elusive the answers become. A case that spirals out of control...It seems impossible that no one saw anything, but soon the leads run cold. Will they uncover what really happened, or will the killer get away with murder?