After their heroic survival, Felix, Andy, Jake and Sam return to their Bremin lives but are shocked that their families and friends no longer recognise them.

Andy's scientific senses are in overdrive as he forms a hypothesis that their loved ones have experienced a collective amnesia, as a result of the trauma of the boys going missing.

But Andy's high-concept theory isn't able to explain other strange events, and the bewildered boys have no choice but to band together once more to try to get to the bottom of their terrifying new predicament. Show less