Vee knows Sophie didn't kill herself. She was murdered. She knows because she was there. Everyone believes Vee is narcoleptic, but she doesn't actually fall asleep during these episodes: when she passes out she slides into somebody else's mind and experiences the world through that person's eyes. But nothing could have prepared Vee for what happens one October night, when she slides into the mind of someone holding a bloody knife, standing over Sophie's slashed body. Enmeshed in a terrifying web of secrets, lies, and danger and with no one to turn to, Vee must find a way to unmask the killer before he or she strikes again.