The Harper and the Wells families have regarded each other with deep suspicion for four generations. The Harpers have been known to offer their psychic talents for less-than-legal purposes, and the powerful Wells clan has a reputation for playing both sides of the street. But for all the years of history and distrust between them, there is a mysterious pact binding the two. They share the responsibility for protecting a long-buried and very dangerous secret.

Sophy Harper and Luke Wells are shocked to learn that her aunt and his uncle have been sleeping together--and now they are both missing. Not only that, but the last traces of them are at the scene of a murder soaked in negative paranormal energy. Clearly, someone is willing to kill to obtain the secret their families have been charged with protecting. Despite their mutual distrust, which, as far as Sophy is concerned extends to Luke's hellhound of a dog, they both know that the terms of the pact must be honored.

Their investigation uncovers a psychic trail leading to a bizarre desert art colony where nothing is as it seems. But Luke and Sophy are concealing a few secrets, too. By a strange twist of fate, a Harper and a Wells have no choice but to trust each other and the fierce attraction that is binding them as surely as the pact between the families.