Katherine Morrissey, a former Christian missionary, lost her faith after the tragic deaths of her family. Now she applies her expertise to debunking religious phenomena. When a series of biblical plagues overrun a small town, Katherine arrives to prove that a supernatural force is not behind the occurrences, but soon finds that science cannot explain what is happening. Instead, she must regain her faith to combat the evil that waits in a Louisiana swamp.

Joshua Steed returns to Missouri a wealthy man with a beautiful wife; however, the past has a way of catching up. Soon Joshua is tangled in a web of rumors, deception and betrayal that threatens to tear his family apart. Back in Kirtland, financial trouble riddles the foundations of the fledgling Church causing a division, and questioning of the Prophet Joseph Smith's divine calling. Has he lost his prophetic gift? Hundreds of Saints immigrate to Missouri, where Governor Boggs raises an army - with Joshua at its head - to address the "Mormon Problem." When the militia receives orders to attack the Mormon settlement, only Joshua can save his family from the gathering mob.