Abby Mills returns to Harper's Island for the wedding celebration of her best friend, Henry Dunn, and his fiance, Trish Wellington. Abby hasn't been...

The wedding party heads out on a scavenger hunt. While out, Trish meets up with an old flame, Henry talks to the locals, and Abby runs into a friend...

When a local girl’s death is ruled a suicide, Abby challenges her father, the Sheriff, to investigate what really happened. As the wedding...

The groomsmen take Henry fishing for his bachelor party and make a gruesome discovery. The bridesmaids celebrate Trish's final days as a bachelorette...

A father/daughter bike ride in the woods leads to a startling revelation. Abby uncovers the Sheriff's secret obsession as Trish and Henry's wedding...

The wedding guests begin preparing to leave the island but the Sheriff suspects that one of them is the killer. Some new information reveals an eerie...

As the guests get ready to leave the island, one guest mysteriously disappears. Abby receives a phone call from someone threatening to kill the...

The group turn against each other. However they find a map and are forced to come together to find Madison.

An attempt to leave the island after Katherine has been killed turns into a disaster that will keep the remaining members of the wedding trapped for...

Abby confronts the killer, but the guests start thinking he may have an accomplice. Another guest dies and another goes missing.

Eight of the suspects battle for survival as the truth is revealed.

The answers are finally unveiled in the season finale.