Last Breath (Nightmare Hall No 17)

Cassidy has the perfect life. Until things start to go wrong. Little things at first, that her friends say she is imagining. People are starting to whisper that Cassidy is losing it. They say she's gone over the edge. That she can't be trusted. But then there's the fall down the stairs, and the poison. Someone is about to end Cassidy's perfect life, with the perfect death.