Will anyone hear you cry? Celia and Alice share everything - their secrets, hopes and the increasing horror that a killer is on the loose and abducting schoolgirls just like them. Three bodies have been found, each shrouded in handwoven fabric. From within the depths of a police investigation, clues are starting to emerge. But as Alice and Celia discover the truth, danger is closer than anyone knows. Who can you trust at a time like this? Four girls walk, arms linked, a paper chain, and in their wake a siren screams- cry blue murder.