What starts as an innocent family boat trip sinks into terror when the Dunne clan finds itself stalked by Richard Grant (Nick Mancuso), a ruthless villain obsessed with Jill (Mitzi Kapture), the Dunne matriarch. Richard wants to be the new man of the house, but first, he must remove Jill's husband (Rick Roberts) from the picture. While a storm rages, the Dunnes and their daughter (Martha MacIsaac) must band together to foil the deadly stalker.