The Penthouse

When Peter and Amanda move into a dream penthouse high above a beach town, watching the boaters in the water below becomes a daily event. When they by-chance meet one of the boat owners they've been watching, the paranoid man opens a Pandora's box when he wrongly assumes Peter has seen something he's trying to hide. The man becomes obsessed with the couple and turns their lives into a spiraling nightmare. Will a skeptical detective be able to stop it before it's too late?