Sadie didn't believe in ghosts, until she became one. When pragmatic physician and budding researcher, Sadie Crawford, goes for a hike, she didn't imagine she would die on the trail. She definitely didn't imagine she would become a ghost. Rather than idly lingering on Earth, she focuses on finding her killer. Uncovering the truth means asking for help from her psychic ex-boyfriend-the one she dumped because she...