The story follows Dexter, a forensics expert in the Miami Police Department who commits crimes himself at night as a serial killer who hunts down those whom he believes have evaded justice.
Serial murderer Dexter is unable to carry out his crimes any more, and he faces a dangerous turning point in his life as he is forced to choose between pursuing his evil passions and keeping his new relationship.
The quiet pattern of Dexter's life is upended when he decides to target a fugitive drug dealer. Amid all of this turmoil, Dexter and Rita are on the verge of making a crucial choice that will determine the course of their relationship.
Dexter faces new challenges that threaten to expose his secret life and becomes involved in the hunt for a new killer. However, his internal conflict becomes more intense with each new crime he commits, threatening to unravel his life.
As Dexter is consumed by grief after Rita's death, Detective Joseph Quinn raises questions that her death does not match the serial killer's crime pattern. Moreover, Dexter battles his dark instincts before a horrific discovery leads him to find a new victim.
Dexter decides to attend his high school reunion, where he discovers a mysterious murder and becomes required to conduct an investigation. However, the threads of the case lead him to a shocking discovery, which triggers painful memories from the past.
A new shock begins to haunt Debra after she witnesses her brother Dexter committing a murder, after which she struggles with her conscience to hide their involvement in the crime, and engages in a personal battle to try to change Dexter's criminal tendencies.
Six months after Maria's death, Dexter is still trying to commit to fatherhood, but he has not stopped carrying out his crimes. Meanwhile, the police are investigating the brutal murder of a guy who had parts of his brain removed, but this crime arouses Dexter's suspicions, and he begins his own...Read more investigation.
After Debra's death, Dexter continues his journey as one of the most dangerous serial killers on Earth, as he must hide and get away from his old life to escape the authorities.