An apocalyptic world turned into a pitch-black sea of nothingness, but smuggler Rosi and her crew of survivors aren't alone. Something hungry lurks below...

Driving a logging truck through the Romanian mountains, smuggler Rosi and her crew come across a radio signal that hints at impending doom. As the world goes completely dark, their truck becomes a vessel sailing across a sea of nothingness.

But they’re not alone: transmissions trickle in through the radio from similar isolated islands across the country, from amateur radio hobbyists and police cars and customs facilities.

Attempting to rescue survivors and find a way out, the group save more lives, but soon discover that something hungry lurks below, and it's sending up agents – and transmissions – of its own.