Driving along the motorway, Will loses his sense of scale. As his condition deepens, he struggles to unpick the sequence of events that led to this predicament, before he's lost forever.

How would you react if your father's last wish was a little bit out there? For siblings Roz and Elli, it becomes a battleground for who will determine their pop's final journey.

Follows a genius programmer who sacrifices everything in his personal and professional life to build a supercomputer of unprecedented power.