Dexter Morgan is a forensic analyst for the Miami-Dade Police Department who leads a double life. By day, he works alongside his colleagues, including his sister Debra (Erika Christensen) and Lieutenant LaGuerta (Lauren Vélez), to solve crimes and analyze evidence. However, by night, Dexter indulges in his dark secret: he is a serial killer who targets other serial killers, using his code to justify his actions.

Throughout the season, Dexter's character is expertly developed, making it easy for viewers to become invested in his story. Hall's portrayal of Dexter is nuanced and multifaceted, conveying the character's intelligence, wit, and vulnerability. As the series progresses, audiences are drawn into Dexter's world, questioning their own moral compass and the true nature of right and wrong.

The central plot of "Dexter" Season 1 revolves around the investigation of the "Ice Truck Killer," a serial killer who is abducting and murdering young men, leaving their organs to be discovered in ice-filled trucks. As Dexter becomes more entrenched in the case, he finds himself drawn to the killer's modus operandi and the dark impulses that drive him.