Abby Radwell's unusual psychic talent has made her an expert in dealing with paranormal books. After a deadly incident in the library of a collector, Abby receives a threat, and rumors swirl that an old alchemical text known as The Key has reappeared. Convinced she needs an investigator who can also play bodyguard, she hires Sam Coppersmith, a specialist in paranormal crystals. Passion flares immediately between them, but neither entirely trusts the other.