Dexter Morgan, a student in Miami during 1991, undergoes a transformation from a regular student to a vengeful serial killer. As his insatiable desires become unbearable, Dexter is forced to find a way to control his inner darkness. With the assistance of his father, Harry, he embraces a Code that aims to guide him in identifying and eliminating individuals who deserve to be removed from society, all while avoiding detection from law enforcement. This proves to be especially challenging for young Dexter as he embarks on a forensics internship at the Miami Metro Police Department.