People think of Mother Nature as a gentle lady. They forget that she's also Death. Sixteen-year-old Poppy Sinclair believes in quantum particles, not tarot cards, in Dawkins, not druids.

Last summer, in a boating accident in the Lake District, Poppy had a brush with death.

But the girl she finds face down in Scariswater hasn't been so lucky.

As she fights to discover the truth behind what she believes is murder, Poppy is forced to concede that people and things are not always what they seem and, slipping ever deeper into a web of lies, jealousy and heart-stopping danger, she comes to realise - too late - that the one thing that can save her has been right there, all the time.