The city's elite are thrown into panic when a member of the upper crust is murdered by a killer dubbed "the Widow." Detective Rijkers is put on the case. The city's most powerful man, Basil Garvey, is a target and works to control the investigation.

The Widow strikes again, and Kenneth Rijkers begins connecting the killings to a 12-year-old mystery, while Basil Garvey, a business oligarch, pulls a number of strings to control the investigation.

Enid's newspaper declares another Widow murder; panic rises, and Kashtinsky gets high to keep focused; Eddie tries to flee, but Basil reminds him that he owns him; Kenneth uncovers proof that links the victims to the killing of Margaret Mehar.

The Widow sends a nasty treat to Basil and friends, which sends Kashtinsky over the edge; the Botticelli sisters arrange for Verdi to have their portraits taken; Georges Rondeau, the prime suspect in the murders, preys on Regina.

The Widow's latest victim is found on Valentine's Day, dragged to death behind a horse and made up to look like Cupid; a torn piece of the Widow's weeds sends Kenneth and Regina off on a hunt; Salomé entertains bidders for Verdi.

The pressure gets to Israel, who admits to her and seven other involvements in Margaret's death; Kenneth secures the suspects, freeing only Israel to operate on a friend of Regina's - inadvertently putting her into the Widow's clutches.

With Kenneth's list of suspects either jailed or buried, he sets his sights on the sly magician Georges, who is slowly losing his grip on reality.

With the Widow's final victim nearly in her clutches, Kenneth's time is running out; however, upon revealing the killer's identity he grapples with how to bring justice to the victims.

Connections to Kit are revealed in flashbacks, while a couple's secret affair is exposed via social media and another slaying strikes the community.

Sarah finds herself at the center of a series of copycat killings and visits the man who murdered her parents in prison and he imparts a cryptic message.

On the first anniversary of a mysterious slaying, the masked killer responsible strikes again, butchering one of the earlier crime's eyewitnesses.

As school is dismissed for the summer, more shocking memories from the past year surface and a teacher who tries to be an ally to Saadia pays a price.

The Druid kills again as Amy recalls her role in Kit's death, Roberta questions multiple witnesses, and plans get underway for the solstice party.

Roberta and Pujit identify a suspect while Violet's lurid, exploitative murder blog goes too far, making her and Joe targets of outrage and revenge.

Attendees of the solstice party are stalked by the Druid while someone engineers a violent confrontation in the basement between Angel and Dan.

Angel and Dan desperately try to escape, Roberta and Pujit get too close to the Druid, and Saadia grows closer to Connor in the hours after the party.

After revealing The Gentleman’s true identity, Theo, Vincent, and Liv face horrific truths about the competition and their family, and the heir to the Galloway fortune claims their prize.

Sarah receives a gruesome package at her new gallery. The Executioner exacts justice on citizens of Waterbury. Sarah attempts to decipher a message in her parcel. Sarah's grandmother pleads with her to leave town.

Sarah believes the killer is using the seven deadly sins as part of their plan and is disappointed by the police chief's lack of responsiveness. Unfortunately Sarah's attempt to investigate the murders leads to misfortune.

Five years after concealing a murder, guilt-stricken summer camp counselors return in midwinter to the scene of their crime, now a utopian commune.

After a body is found and a guest vanishes, both groups discover they're trapped at the camp with communication to the outside world cut off.

As the list of victims continues to grow, the number of possible suspects narrows and the two groups are forced to cooperate despite mutual suspicion.

The histories of several characters unfold in flashback, revealing surprising connections, while an innocent hiker is pulled into the unfolding drama.

Desperate to discover the identity of the killer preying on them, the remaining survivors reluctantly conduct a mock hearing to learn the truth.

Misinterpreted evidence points everyone in a false direction, while one camper finds evidence that makes him question the motive behind the slaughter.