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.

In 1991 Miami, Dexter Morgan transitions from student to avenging serial killer. When his bloodthirsty urges can't be ignored any longer, Dexter must learn to channel his inner darkness. With the guidance of his father, Harry, he adopts a Code designed to help him find and kill people who deserve to be eliminated from society without getting on law enforcements' radar. This is a particular challenge for young Dexter as he begins a forensics internship at the Miami Metro Police Department.