The residents of Garrett Island are part of a visionary experiment. Their cars have been sent to the mainland and now, for one month, they've got self-driving vehicles called Arrivals. With a simple voice command, an Arrival will take you wherever you want to go, and because these cars are networked and aware of each other, road mishaps are a thing of the past. As the world's press arrives for a glimpse of this driverless future, islander and single mum Sandra Montrose preps for the huge media event. She's ready for this new world. Her husband died when he fell asleep at the wheel one night, and she's relieved her two teens, Archie and Katie, may never need drivers' licenses. God knows, Archie already finds enough ways to get into trouble. And Katie, unbeknownst to her mum, is flirting with danger as she investigates what strange secret the old man across the street is keeping in his garage. But as this special media day gets underway, there are signs all is not well. A member of the press has vanished, possibly murdered. There are rumours of industrial sabotage, an unleashing of a malevolent virus. Before long, the Arrivals aren't taking orders from their passengers anymore. They're starting to organise and hunt. And they've got the residents of Garrett Island in their sights.