Talia is a woman on death row who maintains her innocence in the explosive death of her husband, Noel. She spends her days in a small, isolated cell, grappling with intense memories of her past relationship and dealing with deep-seated trust issues stemming from her father's childhood betrayal. She is fiercely passionate and struggles with vivid, disorienting dreams of her late husband that blur the lines of her reality.

Noel is Talia's husband, a dedicated professional who works long hours at a pharmaceutical company. Due to a childhood football injury, he completely lacks a sense of smell, leaving him oblivious to certain dangers. He is deeply devoted to Talia, but his demanding work schedule frequently causes friction and suspicion in their marriage.

Rhea is a correctional officer working on death row. Unlike many of the other guards, she treats the inmates with a level of basic human decency, taking care to be gentle during security procedures. She breaks standard protocol by introducing herself by her first name, offering a rare touch of humanity in a dehumanizing system.

Clarence is Talia's defense attorney who handles the complex appeals process for her capital punishment case. He is a practical and realistic legal advocate who understands the bleak realities of the justice system and tries to prepare his client for the worst possible outcomes.

Kinsey is Talia's best friend from before her incarceration. She is one of the few people who continues to support Talia during her marital struggles and remains one of her only visitors after she is placed on death row.

Father Decker is a prison chaplain who visits death row inmates to read them their last rites before execution. His physical appearance intensely unsettles Talia due to his strong resemblance to her deceased husband.

Lisbeth is an older woman in her seventies who works as a colleague of Noel's at the pharmaceutical lab. She frequently keeps him late at work to finish their experiments and wears a distinct, heavy perfume that Talia notices on Noel's clothing.