In the summer of 1859, a widowed physician reluctantly agrees to take a recently freed slave and her mysterious Caucasian daughter on a five-day journey through the bloody West to find a distant town's Faith Healer. The woman believes her daughter is possessed. The doctor believes she simply carries The Sickness. Either way the fact remains that every living thing the girl touches mysteriously dies.

10 years after Dexter went missing in the eye of Hurricane Laura, we find him living under an assumed name in the small town of Iron Lake, New York. Dexter may be embracing his new life, but in the wake of unexpected events in this close-knit community, his Dark Passenger beckons.

Dexter Morgan awakens from a coma to find Harrison gone without a trace. Realizing the weight of what he put his son through, Dexter sets out for New York City, determined to find him and make things right. But closure won't come easy. When Miami Metro's Angel Batista arrives with questions, Dexter realizes his past is catching up to him fast. As father and son navigate their own darkness in the city that never sleeps, they soon find themselves deeper than they ever imagined - and that the only way out is together.