The guests board a yacht and head to the island. Before they can even depart the boat, one person will be found murdered, which no one had seen. Later, the bride's ex-boyfriend shows up uninvited and another person is found dead.
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 who has been haunted by John Wakefield.
When a local girl commits suicide, Abby insists that her father look into what happened. As the wedding nears, Trish must make her decision about Hunter.
Henry and his groomsmen make a bloody discovery while out fishing. Meanwhile, as Trish and her bridesmaids visit a psychic, Abby is the one she is strongly drawn towards.
Abby uncovers her dad's secret obsession. Meanwhile, not all goes as planned at the wedding rehearsal.
Wellington's murder at the rehearsal has left the wedding party in shock, leaving Abby, Henry and J.D. take it on themselves to investigate this crime.
As the wedding guests ready themselves to leave the island, Abby uncovers a link between herself and John Wakefield, a serial killer. Meanwhile, Sheriff Mills believes that the recent murders was committed by one of the attendees.
As everyone prepares to leave the island, a wedding party guest disappears, followed by Abby receiving a phone call saying no one can leave.
The surviving members of the wedding party search for Madison in the underground tunnels they've discovered.
As the remaining wedding guests attempt to leave the island by boat, an explosion destroys the marina. The group head to a hidden hideaway and discover a surprising secret.
Although one killer has been revealed, those remaining survivors fear a second killer may be among them, as one person disappears and shocking information concerning an islander comes to light.
John Wakefield's murderous rampage continues, as the survivors plot to find and kill him before they are all wiped out.
The series concludes as the mystery is solved.