<p><b>How far would you go to protect your darkest secrets?</b><br><br>When teenager <b>Sadie Winter</b> jumps from the roof of her school, her death is ruled as suicide - a final devastating act from a troubled girl. But then the broken body of a young boy is discovered at the same school and it''s clear to <b>Detective Kim Stone</b> that these deaths are not tragic accidents.<br><br>As Kim and her team begin to unravel a dark web of secrets, one of the teachers could hold the key to the truth. Yet just as she is about to break her silence, she is found dead.<br><br>With more children''s lives at risk, Kim has to consider the unthinkable - whether a fellow pupil could be responsible for the murders. Investigating the psychology of children that kill brings the detective into contact with her former adversary, <b>Dr Alex Thorne</b> - the sociopath who has made it her life''s work to destroy Kim.<br><br>Desperate to catch the killer, Kim finds a link between the recent murders and an in