Harper's Island

Abby Mills returns to Harper's Island for her best friend Henry Dunn's wedding to Trish Wellington, seven years after leaving following the murders of her mother and five others by John Wakefield.

During a wedding scavenger hunt, Trish encounters an ex-boyfriend, Henry resolves a conflict with island residents, and Abby meets a friend troubled by memories of John Wakefield and the island's dark history.

Abby questions her father, the sheriff, about the ruling of a local girl's death as suicide, urging him to look deeper into the case. Meanwhile, Trish faces an important decision about her relationship with Hunter as their wedding draws closer.

During the groomsmen's bachelor party fishing trip, they stumble upon a disturbing find. Meanwhile, the bridesmaids visit a psychic for Trish's bachelorette celebration, where the psychic reacts intensely to Abby's presence.

A father and daughter take a bike ride through the woods, where a hidden truth is unexpectedly uncovered. Meanwhile, Abby discovers the Sheriff's mysterious fixation, and Trish and Henry's wedding rehearsal faces an unforeseen disruption.

After a murder occurs at the wedding rehearsal, Abby, Henry, and J.D. decide to investigate and uncover the truth behind the deadly incident.

Sheriff continues to investigate the murders on the island, suspecting one of the wedding guests is involved. Meanwhile, Abby discovers a troubling connection between herself and Wakefield.

As the wedding party prepares to leave the island on a ship, a guest vanishes without a trace. Abby receives a cryptic phone call warning that if anyone departs the island, the missing person will be killed.

Tensions rise as the remaining wedding party members grow suspicious of each other. They unite after discovering maps of an underground tunnel system in their search for Madison.

As the group tries to reach a boat to escape the island, a large explosion destroys the marina, forcing them to seek shelter elsewhere. At their hideaway, a shocking secret is uncovered, causing tension and uncertainty among the survivors.

Following further deaths and the disappearance of a close friend, the group becomes more resolute in their efforts to uncover and confront the island's killer.

Eight of the original 25 suspects remain as the truth behind the mystery is uncovered, and the competition narrows to determine the final survivors.

Abby finds herself ensnared as the killer's full strategy unfolds, marking a pivotal and somber turn in the investigation.